Can you mix two different motor oil viscosity types to make your own custom viscosity? Is it OK to mix two motor oils of the same viscosity type? What about mixing different brands of engine oil or mixing conventional and synthetic oil? Can you mix motor oils for gasoline and diesel engines? Let’s talk about everything related to mixing motor oil.

First off, a reader asks: I’m looking for an engine oil for my drag race car engine from your Dominator series. But I would like something between the 10W-30 and 15W-50 products that are offered. Can I mix the Dominator 10W-30 and 15W-50 to make (roughly) a 12W-40? Does this work?

Answer: Mixing two different motor oil weights to make your own custom viscosity does not work quite as simply as it sounds. There a couple of unknowns and even some potential complications that have to be considered.

As the additive formula used to construct each viscosity (10W-30 and 15W-50 in this case) can utilize different chemistry, there simply is no way to project how well the mixture will actually work and whether the longevity of the oil mix will be affected.

While the viscosity of the mixture may result in an engine oil somewhere in the SAE 40 range, where the “W” (winter viscosity) will end up is anyone’s guess. Again, different chemistry can be used to “build up” the viscosity of an engine oil, so mixing two from different viscosity ranges is not likely going to deliver the result that you desire.

AMSOIL Dominator Synthetic Racing OilAnother uncertainty is the shear stability of a mixture of two different weights. As the chemistries of the two oils can vary, there is no way to predict how well the blend will stand up to shearing forces and extreme heat. While it may not be a disaster, the safer choice would be using one type of motor oil that was formulated to perform at its best.

Our recommendation would be to use either Dominator 10W-30 or 15W-50 on their own. If you are insistent on SAE 40 oil, consider AMSOIL Synthetic Premium Protection 10W-40 Motor Oil.

If you are in a pinch, you could certainly top-up your engine oil level with an oil from a different viscosity range. It may not be the end of the world, but we are not endorsing the practice of brewing your own custom motor oil formula for complete oil change intervals and especially not for racing purposes.

Can You Mix Motor Oils Of The Same or Similar Viscosity?

What about mixing a 5W-30 and a 10W-30 in your car’s engine? This is better than mixing two completely different grades as both are an SAE 30 weight. But as the winter weights are different, it may not be a major problem (but it also may not be optimal). Adding a 10W-30 to a 5W-30 should be fine for a top-up, but is not ideal for a complete service interval.

What About Mixing Different Brands Of Motor Oil?

For example, assume that you are using Quaker State 5W-30 in your engine and for whatever reason, you need to add oil during a long trip and only Valvoline 5W-30 is available. This is perfectly fine in a situation where you need to top-up your oil level and only a different brand is available. Again, as these oils may have a slightly different chemical make-up, it’s best not to mix two brands for an entire oil change interval.

Can You Mix Synthetic and Conventional Oil?

There may some conventional oil left in your engine when you switch over to synthetic oil and this is no problem. The mix of synthetic oil and conventional oil will not create any sort of chemical discord in your engine.

But when it comes to mixing in larger amounts, the same caveats involved in mixing brands have to be applied here as well. There can be different additive chemistry at play, so adding conventional motor oil to synthetic oil (and vice versa) is fine for a top-up. As AMSOIL’s literature suggests for their synthetic oils, adding regular oil to their long-life synthetics will shorten their lifespan.

Can You Mix Diesel Engine Oil And Gasoline Engine Oil?

While gasoline and heavy-duty diesel engine oils perform similar duties, the operating environment of diesel engines and gasoline engines is quite different. Most diesel engine oils meet the industry specifications for gasoline engines, but most gasoline engine oils are NOT suitable for diesel engines. They simply are not equipped to deal with the soot and high pressures of heavy-duty diesel engines.

The exception is some heavy-duty motor oils that are designed for both diesel and gasoline engine service and some European formulas tailored for gas or diesel cars.

So you can top-up a gasoline-powered car or truck with a diesel engine oil, provided that it meets the proper industry specifications. It is definitely not a good idea to top-up a heavy duty diesel engine with a motor oil designed only for passenger car/gasoline engine service.

Conclusion

The prevailing theme here is that you can mix many all types of motor oil in a pinch, but it should not be done as a general practice. Motor oil makers work very hard to create the right balance of chemical additives, so toying with this balance is generally not going to be of any benefit unless you are in dire need of a top-up.

 

AMSOIL OE Synthetic 10W-30 Motor Oil

Is there any need to switch to 10W-30 engine oil during the summer months?

A reader asks: I use 5W-30 motor oil in my Infinti G35 during the winter and my owner’s manual suggests that it is suitable to use 10W-30 in warmer temperatures. Is there any real benefit to switching to 10W-30 in the summer and back to 5W-30 in the fall?

Answer: There is absolutely no need to switch to 10W-30 motor oil in the summer if 5W-30 is an acceptable grade for your engine. While some car manufacturers still advocate the use of 10W-30 (or even 10W-40) as an appropriate engine oil option for summer use, it is completely unnecessary.

Today’s 5W-30 motor oils provide consistent protection at both extremes of the temperature spectrum. During hot operating conditions, they are resistant to thinning out, breaking down, boiling off and degrading to the point where they might cause deposits. Remember also that a 10W-30 and 5W-30 are essentially the same viscosity at operating temperature, so there is no tangible advantage switching over to 10W-30 for summer driving.

There used to be a time when switching to a heavier motor during the summer was a necessity. Four or five decades ago, engine oil technology was far less advanced and engine tolerances were less precise. Thicker engine oil was needed in summer to combat wear and oil consumption. These thicker grades did not pump well in extreme cold, so a seasonal oil viscosity change was once a common part of regular maintenance. This habit does still linger, but today’s motor oils (especially synthetic oil) negate the need for a seasonal viscosity changeover in either gasoline or diesel engines.

Enjoy the convenience of keeping one engine oil grade on hand and take solace in the fact that using 5W-30 for year round use will not compromise engine protection in the slightest.

Updated for 2016. Find a substitute for marine oil products from over 70 brands.

AMSOIL Marine Group 2016
This cross-reference guide gives you an AMSOIL substitute for most two or four-cycle outboard/marine engine oils and lower unit gear oils sold in the United States and Canada. We have examined the products from over 70 oil brands and have listed a first-rate substitute that will dramatically improve the performance and extend the life of your boat or personal watercraft engine. Best of all, we can sell AMSOIL Synthetic Marine Oils at wholesale and ship it right to your door.

You will note that the vast majority of TC-W3 marine 2-stroke oils have two AMSOIL alternates listed, with those being AIO Synthetic 2-Stroke Injector Oil and HP Marine 2-Stroke Synthetic Oil. The reason being is that either of these products are a viable upgrade over most ordinary outboard two-cycle engine oils. AIO Injector is a versatile, value-priced synthetic, while HP Marine is AMSOIL’s best offering for 2-stroke marine applications. Either will perform exceptionally well, but you can decide if you want a great oil (AIO Injector) or our absolute best (HP Marine).  If you have questions, feel free to contact us with the form on your right or call us at 1-800-748-5781.

Here is a description of our AMSOIL substitutes.

HP Marine Synthetic 2-Cycle Oil– AMSOIL’s best for 2-cycle marine engines requiring the TC-W3 specification. Test-proven for the demanding requirements of Evinrude E-TEC engines. Also ideal for direct fuel injection (DFI) 2-cycle engines (DFI). Low-smoke, great performance and low aquatic toxicity rounds out an unbeatable package. Suitable for oil injection or 50: premix.

“AIO” Injector Synthetic 2-Cycle Oil – A multi-purpose synthetic 2-cycle oil that is value-priced. Can be used for outboards requiring the TC-W3 spec or personal watercraft requiring the API-TC spec. It can also be used in your snowmobile in the winter. But don’t let AIO Injector’s versatility or price fool you. This product is a serious synthetic challenger that fights wear and performs like a champ. AIO Injector is suitable for direct fuel injection (DFI) engines. Can be used in oil injected engines or premix at 50:1.

Saber Outboard Synthetic 2-Cycle Pre-Mix Oil – A dedicated outboard pre-mix oil for outboards that covers any mix ratio. Upgrade the performance of your outboard engine with dramatically reduced smoke and odor, improved throttle response and exceptional wear control.

Interceptor Synthetic 2-Cycle Oil– This is the ultimate engine oil for 2-stroke personal watercraft engines that require the API-TC specification. Many personal watercraft such some Sea-Doo models and 2-stroke Yamaha WaveRunners require a low-ash engine oil rather than a TC-W3 oil for water-cooled outboards. AMSOIL Interceptor provides supreme performance along with clean exhaust power valves.

AMSOIL 10W-30 4-Stroke Marine Synthetic Motor Oil– An NMMA FC-W “Catalyst Compatible” approved engine oil for 4-stroke outboard, inboard and personal watercraft engines. Provides synthetic wear control and outstanding anti-rust protection in marine engines suggesting a 5W-30, SAE 30 or 10W-30 marine engine oil.

AMSOIL 10W-40 4-Stroke Marine Synthetic Motor Oil– A synthetic oil for gasoline-powered 4-stroke outboard, inboard and personal watercraft engines. An NMMA FC-W “Catalyst Compatible” licensed motor oil. Ideal for marine engines requiring an SAE 40, 15W-40, 25W-40 or 10W-40 oil.

AMSOIL 25W-40 Synthetic-Blend Marine Motor Oil– Formulated to comply with Mercury and Mercruiser warranties. Suitable for outboard, inboard and stern drive motors. NMMA FC-W “Catalyst Compatible” licensed.

AMSOIL 15W-40 Synthetic Heavy Duty Diesel & Marine Motor Oil– A robust motor oil formula for heavy-duty diesel marine engines. Provides long service life and long engine life in severe service conditions of marine diesel engines.

AMSOIL Universal 75/80W-90 Synthetic Marine Gear Lube– This lower unit marine gear oil is ideal for any application requiring a 75W-90, 80W-90 or SAE 90 gear oil. Great for outboard lower units, stern drives, v-dries and ZF Marine Transmissions. The high-tech synthetic formula reduces heat and friction, even with 10% water contamination.

Ace Hardware

Two-Cycle Oil

Ace Two-Cycle Outboard Engine Oil- AIO Injector or HP Marine

Amalie

Two-Cycle Oil

Amalie Pro Two-Cycle TC-W3 RL- AIO Injector or HP Marine

Aqua Lube

Two-Cycle Oil

Aqua Lube Two-Cycle Outboard Engine Oil- AIO Injector or HP Marine

Four-Cycle Oil

Aqua Lube Four-Stroke Outboard Engine Oil- AMSOIL 10W-30 4-Stroke Marine Synthetic Motor Oil or AMSOIL 10W-40 4-Stroke Marine Synthetic Motor Oil

Marine Gear Oil

Aqua Lube Lower Unit Oil- AMSOIL Universal 75/80W-90 Synthetic Marine Gear Lube

Blue Marble

Two-Cycle Oil

Blue Marble high Performance Two-Cycle Oil- AIO Injector or HP Marine

BRP/Sea-Doo

Two-Cycle Oil

BRP XPS Mineral 2-Stroke Oil- Interceptor
BRP XPS Synthetic 2-Stroke Oil- Interceptor

Four-Cycle Oil

BRP XPS 4-Stroke Synthetic Oil- Summer Grade- AMSOIL 10W-30 4-Stroke Marine Synthetic Motor Oil or AMSOIL 10W-40 4-Stroke Marine Synthetic Motor Oil
BRP XPS 4-Stroke Synthetic Oil- All Climate Grade- AMSOIL 10W-30 4-Stroke Marine Synthetic Motor Oil or AMSOIL 10W-40 4-Stroke Marine Synthetic Motor Oil

Bel-Ray

Two-Cycle Oil

Bel-Ray Marine Biodegradable 2-Stroke Engine Oil- HP Marine
Bel-Ray Marine HP Synthetic Blend 2T 2-Stroke Engine Oil- AIO Injector or HP Marine

Four-Cycle Oil

Bel-Ray Marine Semi-Synthetic 4-Stroke 10W-30 Engine Oil- AMSOIL 10W-30 4-Stroke Marine Synthetic Motor Oil
Bel-Ray Marine Semi-Synthetic 4-Stroke 10W-40 Engine Oil- AMSOIL 10W-40 4-Stroke Marine Synthetic Motor Oil
Bel-Ray Marine 4-Stroke 25W-40 Engine Oil- 25W-40 Synthetic-Blend Marine Motor Oil
Bel-Ray 15W-40 Marine Diesel Engine Oil- AMSOIL 15W-40 Synthetic Heavy Duty Diesel & Marine Motor Oil

Marine Gear Oil

Bel-Ray Mineral Marine Gear Oil- AMSOIL Universal 75/80W-90 Synthetic Marine Gear Lube
Bel-Ray Semi-Synthetic Marine Gear Oil- AMSOIL Universal 75/80W-90 Synthetic Marine Gear Lube
Bel-Ray Synthetic Marine Gear Oil- AMSOIL Universal 75/80W-90 Synthetic Marine Gear Lube

Cabela’s

Two-Cycle Oil

Cabela’s Signature Semi-Synthetic 2-Cycle Oil- AIO Injector or HP Marine

Four-Cycle Oil

Cabela’s Signature Semi-Synthetic 10W-30 4-Cycle Oil- AMSOIL 10W-30 4-Stroke Marine Synthetic Motor Oil
Cabela’s Signature Semi-Synthetic 25W-40 4-Cycle Oil- AMSOIL 25W-40 Synthetic-Blend Marine Motor Oil

Marine Gear Oil

Cabela’s Signature Lower Unit Synthetic Gear Lube- AMSOIL Universal 75/80W-90 Synthetic Marine Gear Lube

Cam 2

Two-Cycle Oil

Cam 2 Blue Blood Marine 2-Cycle Oil TC-W3- AIO Injector or HP Marine

Canadian Tire

Two-Cycle Oil

MotoMaster Formula 1 2-Cycle Outboard Engine Oil- AIO Injector or HP Marine

Four-Cycle Oil

MotoMaster 10W-30 Synthetic 4-Cycle Outboard Engine Oil- AMSOIL 10W-30 4-Stroke Marine Synthetic Motor Oil

Carquest

Two-Cycle Oil

Carquest Premium 50:1 2-Cycle Outboard Oil- Saber Outboard or AIO Injector
Carquest Multi-Purpose 50:1 2-Cycle Outboard Oil- Saber Outboard or AIO Injector

Marine Gear Oil

Carquest Marine Lower Unit Gear Lube- AMSOIL Universal 75/80W-90 Synthetic Marine Gear Lube

Castrol

Two-Cycle Oil

Castrol Super Outboard 2-Stroke Engine Oil- AIO Injector or HP Marine

Marine Gear Oil

Castrol Outboard Gear Oil EP 90- AMSOIL Universal 75/80W-90 Synthetic Marine Gear Lube

Chevron

Two-Cycle Oil

Chevron Super Outboard 3 Two-Stroke Oil- AIO Injector or HP Marine

CITGO

Two-Cycle Oil

CITGO Supergard Marine Plus Two-Cycle Engine Oil- AIO Injector or HP Marine
CITGO Supergard Sea and Snow Two-Cycle Engine Oil- AIO Injector

Marine Gear Oil

CITGO Supergard Marine Plus Lower Unit Gear Lube- AMSOIL Universal 75/80W-90 Synthetic Marine Gear Lube

Coastal

Two-Cycle Oil

Coastal TC-W3 Two-Stroke Oil- AIO Injector or HP Marine

Conoco

Two-Cycle Oil

Conoco XHP 2-Cycle Engine Oil- AIO Injector or HP Marine

Co-op

Two-Cycle Oil

Co-op Dynamix Plus Two-Cycle Motor Oil- AIO Injector or HP Marine

C-R-C

Marine Gear Oil

C-R-C Marine Hypoid 90 Lower Unit Gear Lube- AMSOIL Universal 75/80W-90 Synthetic Marine Gear Lube

Crown Outboard

Two-Cycle Oil

Crown Premium Outboard Two-Cycle Oil- AIO Injector or HP Marine

Evinrude

Two-Cycle Oil

Evinrude E-TEC XD 100 Synthetic 2-Cycle Oil- HP Marine
Evinrude XD 30 Synthetic 2-Cycle Oil- AIO Injector or HP Marine
Evinrude XD 50 Synthetic-Blend 2-Cycle Oil- AIO Injector or HP Marine

Four-Cycle Oil

Evinrude Johnson Ultra Synthetic Blend 4-Stroke Oil- AMSOIL 10W-30 4-Stroke Marine Synthetic Motor Oil or AMSOIL 10W-40 4-Stroke Marine Synthetic Motor Oil

Marine Gear Oil

Evinrude Pro Gearcase Lubricant- AMSOIL Universal 75/80W-90 Synthetic Marine Gear Lube

Honda

Four-Cycle Oil

Honda Marine 10W-30 4-Stroke Motor Oil- AMSOIL 10W-30 4-Stroke Marine Synthetic Motor Oil
Honda Marine 5W-30 4-Stroke Motor Oil- AMSOIL 10W-30 4-Stroke Marine Synthetic Motor Oil

Marine Gear Oil

Honda Outboard Motor Lower Unit Gear Case Oil- AMSOIL Universal 75/80W-90 Synthetic Marine Gear Lube

Irving Oil

Two-Cycle Oil

Irving 2-Cycle Plus Engine Oil- AIO Injector or HP Marine

Itasca

Two-Cycle Oil

Itasca Marine 2-Cycle Outboard TC-W3 Engine Oil- AIO Injector or HP Marine

Marine Gear Oil

Itasca Marine 80W-90 Gear Oil- AMSOIL Universal 75/80W-90 Synthetic Marine Gear Lube

Kawasaki

Two-Cycle Oil

Kawasaki 2-Cycle High Performance Watercraft Oil- AIO Injector or HP Marine
Kawasaki Kawachem 2-Cycle TC-W3 Marine Oil- AIO Injector or HP Marine

Four-Cycle Oil

Kawasaki 10W-40 4-Stroke Jet-Ski Watercraft Engine Oil- AMSOIL 10W-40 4-Stroke Marine Synthetic Motor Oil

Kendall

Two-Cycle Oil

Kendall 50:1 Outboard and 2-Cycle Motor Oil- Saber Outboard or AIO Injector
Kendall GT-1 2-Cycle Motor Oil- AIO Injector or HP Marine

Klondike

Two-Cycle Oil

Klondike TC-W3 2-Cycle Engine Oil- AIO Injector or HP Marine

Klotz

Two-Cycle Oil

Klotz TC-W3 Outboard Techniplate Synthetic Two-Stroke Oil- AIO Injector or HP Marine
Klotz TC-W3 Skicraft Techniplate Synthetic Two-Stroke Oil- AIO Injector or HP Marine for applications requiring the TC-W3 spec and Interceptor for those requiring API TC

Four-Cycle Oil

Klotz Skicraft X4 Techniplate 10W-40 Synthetic 4-Stroke Engine Oil- AMSOIL 10W-40 4-Stroke Marine Synthetic Motor Oil

Lubrimatic

Two-Cycle Oil

Lubrimatic TC-W3 2-Cycle Outboard Motor Oil- AIO Injector or HP Marine

Marine Gear Oil

Lubrimatic Hypoid 90 Marine Lower Unit Gear Lube- AMSOIL Universal 75/80W-90 Synthetic Marine Gear Lube
Lubrimatic Power Pro Marine Lower Unit Gear Lube- AMSOIL Universal 75/80W-90 Synthetic Marine Gear Lube

Legend Performance

Two-Cycle Oil

Legend ZX-2R 2-Cycle Oil- AIO Injector or HP Marine
Legend ZX-2SR 2-Cycle Oil- AIO Injector or HP Marine for applications requiring the TC-W3 spec and Interceptor for those requiring API TC

Four-Cycle Oil

Legend ZX4PS 4-Stroke 10W-40 Engine Oil- AMSOIL 10W-40 4-Stroke Marine Synthetic Motor Oil

Lucas Oil

Two-Cycle Oil

Lucas High Performance Semi-Synthetic 2-Cycle Land & Sea Oil- AIO Injector or HP Marine

Four-Cycle Oil

Lucas Stern Drive 25W-40 Inboard Engine Oil- AMSOIL 25W-40 Synthetic-Blend Marine Motor Oil
Lucas Synthetic 10W-30 Outboard Engine Oil- AMSOIL 10W-30 4-Stroke Marine Synthetic Motor Oil
Lucas Synthetic 10W-40 Outboard Engine Oil- 10W-40 Formula 4-Stroke Marine Synthetic Motor Oil

Marine Gear Oil

Lucas M8 Synthetic SAE 75W-90 Marine Gear Oil- AMSOIL Universal 75/80W-90 Synthetic Marine Gear Lube

Mag 1

Two-Cycle Oil

MAG 1 Marine TC-W3 2-Cycle Oil- AIO Injector or HP Marine

Marine Gear Oil

MAG 1 High Performance Marine SAE 80W-90 Lower Unit Gear Lube- AMSOIL Universal 75/80W-90 Synthetic Marine Gear Lube

Maxima

Two-Cycle Oil

Maxima Marine Pro High Performance 2-Cycle Oil- AIO Injector or HP Marine

Four-Cycle Oil

Maxima PWC Marine 10W-40 4-Cycle Oil- AMSOIL 10W-40 4-Stroke Marine Synthetic Motor Oil

Master Mechanic

Two-Cycle Oil

Master Mechanic 2-Cycle Outboard Oil- AIO Injector or HP Marine

Mystik

Two-Cycle Oil

Mystik 2-Cycle Sea and Snow Engine Oil- AIO Injector or HP Marine for applications requiring the TC-W3 spec and Interceptor for those requiring API TC
Mystik JT-4 2-Cycle Personal Watercraft Engine Oil- AIO Injector or HP Marine for applications requiring the TC-W3 spec and Interceptor for those requiring API TC

Four-Cycle Oil

Mystik JT-4 4-Cycle 10W-40 Marine Engine Oil- AMSOIL 10W-40 4-Stroke Marine Synthetic Motor Oil

Marine Gear Oil

Mystik JT-4 Premium Lower Unit Gear Lube- AMSOIL Universal 75/80W-90 Synthetic Marine Gear Lube

Mallory Marine Products

Two-Cycle Oil

Mallory Marine Premium TC-W3 Two-Cycle Engine Oil- HP Marine

Four-Cycle Oil

Mallory 10W-40 Marine 4-Stroke Engine Oil- AMSOIL 10W-40 4-Stroke Marine Synthetic Motor Oil
Mallory 25W-40 Marine Semi-Synthetic Engine Oil- AMSOIL 25W-40 Synthetic-Blend Marine Motor Oil

Marine Gear Oil

Mallory Marine High Performance Synthetic Blend Gear Lube- AMSOIL Universal 75/80W-90 Synthetic Marine Gear Lube

Master Pro

Two-Cycle Oil

Masterpro Two-Cycle TC-W3 Marine Engine Oil- AIO Injector or HP Marine

Mercury Marine

Two-Cycle Oil

Mercury Premium Plus 2-Cycle Outboard Oil- HP Marine
Mercury Optimax/DFI 2-Cycle Outboard Oil- HP Marine
Mercury Premium 2-Cycle Outboard Oil- AIO Injector or HP Marine

Four-Cycle Oil

Mercury 25W-40 Synthetic Blend 4-Stroke Outboard Oil- AMSOIL 25W-40 Synthetic-Blend Marine Motor Oil
Mercury 10W-30 Synthetic Blend 4-Stroke Outboard Oil- AMSOIL 10W-30 4-Stroke Marine Synthetic Motor Oil
Mercury 15W-40 Heavy Duty Diesel Engine Oil- AMSOIL 15W-40 Synthetic Heavy Duty Diesel & Marine Motor Oil

Marine Gear Oil

Mercury SAE 90 Premium Gear Lube- AMSOIL Universal 75/80W-90 Synthetic Marine Gear Lube
Mercury SAE 90 High-Performance Gear Lube- AMSOIL Universal 75/80W-90 Synthetic Marine Gear Lube

Mobil

Two-Cycle Oil

Mobil Outboard Plus 2-Stroke Engine Oil- AIO Injector or HP Marine

Marine Gear Oil

Mobil Outboard Gear Oil- AMSOIL Universal 75/80W-90 Synthetic Marine Gear Lube

Motorex

Two-Cycle Oil

Motorex Ocean FS 2T BIO Synthetic 2-Stroke Oil- HP Marine

Four-Cycle Oil

Motorex Ocean FC 10W-40 Synthetic 4T Marine Oil- AMSOIL 10W-40 4-Stroke Marine Synthetic Motor Oil
Motorex Ocean FS Synthetic 4T Marine Oil- AMSOIL 10W-30 4-Stroke Marine Synthetic Motor Oil or AMSOIL 10W-40 4-Stroke Marine Synthetic Motor Oil
Motorex Jet Speed 4T 10W-40 Synthetic Marine Oil- AMSOIL 10W-40 4-Stroke Marine Synthetic Motor Oil

Marine Gear Oil

Motorex Marine Universal Gear Oil- AMSOIL Universal 75/80W-90 Synthetic Marine Gear Lube

Motul

Two-Cycle Oil

Motul 600 Dijet 2T Synthetic 2-Stroke Oil- HP Marine
Motul Powerjet 2T Synthetic 2-Stroke Oil- HP Marine

Four-Cycle Oil

Motul Powerjet 4T 10W-40 Synthetic 4-Stroke Oil- AMSOIL 10W-40 4-Stroke Marine Synthetic Motor Oil

Nemco

Two-Cycle Oil

Nemco Two-Stroke Engine Oil- AIO Injector or HP Marine

Nissan

Two-Cycle Oil

Nissan Marine Two-Stroke TC-W3 Engine Oil- AIO Injector or HP Marine
Nissan “Complete Advantage” 100% Full Synthetic TLDI 2-Cycle Oil- HP Marine

Four-Cycle Oil

Nissan Marine FC-W 4-Stroke Oil- AMSOIL 10W-30 4-Stroke Marine Synthetic Motor Oil or AMSOIL 10W-40 4-Stroke Marine Synthetic Motor Oil

Opti

Two-Cycle Oil

Opti-2 2-Cycle Oil- Saber Outboard

Four-Cycle Oil

Opti-4 10W-30 4-Cycle Engine Oil- AMSOIL 10W-30 4-Stroke Marine Synthetic Motor Oil

Philips 66

Two-Cycle Oil

Philips 66 Injex 2-Cycle TC-W3 Motor Oil- AIO Injector or HP Marine
Philips 66 Synjex Synthetic 2-Cycle Motor Oil- AIO Injector or HP Marine

Peak

Two-Cycle Oil

Peak 2-Cycle Engine Oil- AIO Injector or HP Marine

Petro-Canada

Two-Cycle Oil

Petro-Canada 2-Stroke Outboard Motor Oil- AIO Injector or HP Marine

Pennzoil

Two-Cycle Oil

Pennzoil Premium Outboard and Multi-Purpose 2-Cycle Engine Oil- AIO Injector or HP Marine
Pennzoil Premium Plus Synthetic Blend Outboard 2-Cycle Engine Oil- AIO Injector or HP Marine
Pennzoil Marine Full Synthetic 2-Cycle Oil- HP Marine
Pennzoil Marine XLF Extended Life Formula TC-W3 Outboard 2-Cycle Synthetic Blend Oil- HP Marine

Four-Cycle Oil

Pennzoil Marine Premium Outboard 4-Cycle 10W-30 Engine Oil- AMSOIL 10W-30 4-Stroke Marine Synthetic Motor Oil
Pennzoil Marine 4-Cycle/Heavy Duty 15W-40 Engine Oil- AMSOIL 15W-40 Synthetic Heavy Duty Diesel & Marine Motor Oil

Penrite

Two-Cycle Oil

Penrite Biomarine Full Synthetic Outboard 2-Stroke Oil- HP Marine
Penrite Premium Mineral Marine Outboard 2-Stroke Oil- AIO Injector or HP Marine

Four-Cycle Oil

Penrite Marine Outboard Four-Stroke 10W-30 Motor Oil- AMSOIL 10W-30 4-Stroke Marine Synthetic Motor Oil
Penrite Marine Outboard Four-Stroke Semi-Synthetic 10W-40 Motor Oil- AMSOIL 10W-40 4-Stroke Marine Synthetic Motor Oil
Penrite Marine Inboard Four-Stroke 25W-40 Motor Oil- AMSOIL 25W-40 Synthetic-Blend Marine Motor Oil
Penrite Marine Semi-Synthetic 15W-40 Diesel Motor Oil- AMSOIL 15W-40 Synthetic Heavy Duty Diesel & Marine Motor Oil

Marine Gear Oil

Penrite Marine Synthetic SAE 75W-90 Gear Oil- AMSOIL Universal 75/80W-90 Synthetic Marine Gear Lube

Pinnacle Oil

Two-Cycle Oil

Pinnacle 2-Cycle Outboard Engine Oil- AIO Injector or HP Marine

Four-Cycle Oil

Pinnacle 4-Cycle 10W-30 Marine engine Oil- AMSOIL 10W-30 4-Stroke Marine Synthetic Motor Oil
Pinnacle 4-Cycle 10W-40 Marine engine Oil- AMSOIL 10W-40 4-Stroke Marine Synthetic Motor Oil

Pure Guard

Two-Cycle Oil

Pure Guard TC-W3 2-Cycle Engine Oil- AIO Injector or HP Marine

Ravenol

Two-Cycle Oil

Ravenol Outboard 2T Fullsynth 2-Stroke Oil- AIO Injector or HP Marine
Ravenol Outboard 2T Teilsynth 2-Stroke Oil- AIO Injector or HP Marine
Ravenol Outboard 2T Mineral 2-Stroke Oil- AIO Injector or HP Marine
Ravenol Watercraft 2T Fullsynth 2-Stroke Oil- AIO Injector or HP Marine
Ravenol Watercraft 2T Teilsynth 2-Stroke Oil- AIO Injector or HP Marine
Ravenol Watercraft 2T Mineral 2-Stroke Oil- AIO Injector or HP Marine

Four-Cycle Oil

Ravenol Outboard 4T 10W-30 Engine oil- AMSOIL 10W-30 4-Stroke Marine Synthetic Motor Oil
Ravenol Outboard 4T 10W-40 Engine oil- AMSOIL 10W-40 4-Stroke Marine Synthetic Motor Oil

Red Line

Two-Cycle Oil

Red Line Two-Stroke Watercraft Injection Oil- AIO Injector or HP Marine

Repsol

Two-Cycle Oil

Repsol Nautico Outboard and Jet Ski 2T Two-Stroke Engine Oil- AIO Injector or HP Marine

Four-Cycle Oil

Repsol Nautico Outboard 4T 10W-40 Four-Cycle Engine Oil- AMSOIL 10W-40 4-Stroke Marine Synthetic Motor Oil
Repsol Nautico Diesel 15W-40 Engine Oil- AMSOIL 15W-40 Synthetic Heavy Duty Diesel & Marine Motor Oil

Rock Oil

Two-Cycle Oil

Rock Oil MP3 Ultra Synthetic Blend Two-Stroke Engine Oil- AIO Injector or HP Marine
Rock Oil MP3 Sport Synthetic Blend Two-Stroke Engine Oil- AIO Injector or HP Marine
Rock Oil MPR Injector Full Synthetic Two-Stroke Engine Oil- Interceptor

Four-Cycle Oil

Rock Oil MP+ Sport 10W-40 4-Stroke Marine Outboard Engine Oil- AMSOIL 10W-40 4-Stroke Marine Synthetic Motor Oil
Rock Oil MP Lite D Multi-Grade 15W-40 Diesel Engine Oil- AMSOIL 15W-40 Synthetic Heavy Duty Diesel & Marine Motor Oil

Marine Gear Oil

Rock Oil MP Gear Marine Gear Oil- AMSOIL Universal 75/80W-90 Synthetic Marine Gear Lube

Royal Purple

Two-Cycle Oil

Royal Purple HP 2C Synthetic Two-Stroke Oil- AIO Injector or HP Marine

Four-Cycle Oil

Royal Purple HPM High Performance 10W-30 Synthetic Marine Oil- AMSOIL 10W-30 4-Stroke Marine Synthetic Motor Oil
Royal Purple HPM High Performance 10W-40 Synthetic Marine Oil- AMSOIL 10W-40 4-Stroke Marine Synthetic Motor Oil

Marine Gear Oil

Royal Purple HPM High Performance 80W-90 Synthetic Marine Gear Oil- AMSOIL Universal 75/80W-90 Synthetic Marine Gear Lube

Schaeffer Oil

Two-Cycle Oil

Schaeffer #706 Supreme 7000 Synthetic Plus 2-Cycle Oil- AIO Injector or HP Marine

Four-Cycle Oil

Schaeffer #700 Supreme 7000 Synthetic Plus 15W-40 Diesel Engine Oil- AMSOIL 15W-40 Synthetic Heavy Duty Diesel & Marine Motor Oil

Marine Gear Oil

Schaeffer #267 Supreme 80W-90 Gear Lube- AMSOIL Universal 75/80W-90 Synthetic Marine Gear Lube

76 Oil

Two-Cycle Oil

76 Unimix 2-Cycle Motor Oil- AIO Injector or HP Marine

Shell

Two-Cycle Oil

Shell Nautilus Premium 2-Cycle Engine Oil- AIO Injector or HP Marine

Sierra

Two-Cycle Oil

Sierra Synthetic TC-W3 2-Cycle Oil-HP Marine
Sierra Synthetic Direct Injection Synthetic Blend TC-W3 2-Cycle Oil- HP Marine
Sierra Premium Blue TC-W3 2-Cycle Oil- AIO Injector or HP Marine

Four-Cycle Oil

Sierra 25W-40 Premium Blend 4-Stroke Marine Oil- AMSOIL 25W-40 Synthetic-Blend Marine Motor Oil
Sierra 25W-40 Synthetic Blend 4-Stroke Marine Oil- AMSOIL 25W-40 Synthetic-Blend Marine Motor Oil
Sierra 10W-40 Synthetic Blend 4-Stroke Marine Oil- AMSOIL 10W-40 4-Stroke Marine Synthetic Motor Oil
Sierra 10W-30 Full Synthetic 4-Stroke Marine Oil- AMSOIL 10W-30 4-Stroke Marine Synthetic Motor Oil
Sierra 10W-30 Premium Blend 4-Stroke Marine Oil- AMSOIL 10W-30 4-Stroke Marine Synthetic Motor Oil
Sierra 25W-40 Premium Blend Catalyst Compatible 4-Stroke Marine Oil- AMSOIL 25W-40 Synthetic-Blend Marine Motor Oil
Sierra 25W-40 Synthetic Blend Catalyst Compatible 4-Stroke Marine Oil- AMSOIL 25W-40 Synthetic-Blend Marine Motor Oil
Sierra 10W-30 Premium Blend Catalyst Compatible 4-Stroke Marine Oil- AMSOIL 10W-30 4-Stroke Marine Synthetic Motor Oil

Marine Gear Oil

Sierra Premium Marine Gear Lube- AMSOIL Universal 75/80W-90 Synthetic Marine Gear Lube
Sierra High Performance Synthetic Blend Marine Gear Lube- AMSOIL Universal 75/80W-90 Synthetic Marine Gear Lube
Sierra Full Synthetic Marine Gear Lube- AMSOIL Universal 75/80W-90 Synthetic Marine Gear Lube

Spectro

Two-Cycle Oil

Spectro Marine Extreme PWC 2-Stroke Engine Oil- Interceptor

Starbrite

Two-Cycle Oil

Starbrite Premium Synthetic Blend 2-Cycle Engine Oil- AIO Injector or HP Marine
Starbrite Super Premium Synthetic Blend 2-Cycle Engine Oil- HP Marine

Four-Cycle Oil

Starbrite Super Premium Synthetic Blend 10W-30 4-Stroke Engine Oil- AMSOIL 10W-30 4-Stroke Marine Synthetic Motor Oil
Starbrite Super Premium Synthetic Blend 10W-40 4-Stroke Engine Oil- AMSOIL 10W-40 4-Stroke Marine Synthetic Motor Oil
Starbrite Premium Synthetic Blend 25W-40 4-Stroke Engine Oil- AMSOIL 25W-40 Synthetic-Blend Marine Motor Oil
Starbrite Pro Star Super Premium Diesel Marine 15W-40 Motor Oil- AMSOIL 15W-40 Synthetic Heavy Duty Diesel & Marine Motor Oil

Marine Gear Oil

Starbrite Pro Star Ultra High Performance 80W-90 Lower Unit Gear Lube- AMSOIL Universal 75/80W-90 Synthetic Marine Gear Lube
Starbrite High Viscosity 80W-90 Lower Unit Gear Lube- AMSOIL Universal 75/80W-90 Synthetic Marine Gear Lube
Starbrite Hypoid 90W Lower Unit Gear Lube- AMSOIL Universal 75/80W-90 Synthetic Marine Gear Lube
Starbrite Synthetic Blend High Performance 80W-90 Lower Unit Gear Lube- AMSOIL Universal 75/80W-90 Synthetic Marine Gear Lube

Super S (Smitty’s Supply Inc.)

Two-Cycle Oil

Super S Premium TC-W3 2-Cycle Outboard Oil- AIO Injector or HP Marine
Super S SuperSyn TC-W3 2-Cycle Outboard Oil- AIO Injector or HP Marine

Marine Gear Oil

Super S Marine Lower Unit 80W-90 Gear Lube- AMSOIL Universal 75/80W-90 Synthetic Marine Gear Lube

Sunoco

Two-Cycle Oil

Sunoco 2-Cycle Engine Oil- AIO Injector or HP Marine

SureGuard

Two-Cycle Oil

SureGuard TC-W3 2-Cycle Outboard Oil- AIO Injector or HP Marine

Suzuki

Four-Cycle Oil

Suzuki 4 Cycle Marine Engine Oil- AMSOIL 10W-30 4-Stroke Marine Synthetic Motor Oil or AMSOIL 10W-40 4-Stroke Marine Synthetic Motor Oil

Tek-Star

Two-Cycle Oil

Tek-Star TekNautica 2-Cycle TC-W3 Oil- AIO Injector or HP Marine

Texas Tea Motor Oil

Two-Cycle Oil

Texas Tea 100% Synthetic 2-Stroke Outboard Marine Oil- AIO Injector

Torco

Two-Cycle Oil

Torco Synthetic Blend PWC Watercraft 2-Stroke Oil- AIO Injector

Total

Two-Cycle Oil

Total Neptuna 2T Bio-Jet Synthetic 2-Cycle Engine Oil- HP Marine
Total Neptuna 2T Racing Synthetic 2-Cycle Engine Oil- HP Marine
Total Neptuna 2T Super Sport 2-Cycle Engine Oil- AIO Injector or HP Marine

Four-Cycle Oil

Total Neptuna Speeder 10W-30 Synthetic 4-Stroke Marine Engine Oil- AMSOIL 10W-30 4-Stroke Marine Synthetic Motor Oil

Tohatsu

Two-Cycle Oil

Tohatsu Premium Synthetic Blend 2-Stroke TC-W3 Engine Oil- AIO Injector or HP Marine
Tohatsu “Complete Advantage” 100% Synthetic 2-Stroke Engine Oil- HP Marine

Four-Cycle Oil

Tohatsu 4-Stroke FC-W Engine Oil- AMSOIL 10W-40 4-Stroke Marine Synthetic Motor Oil

True Value Hardware

Two-Cycle Oil

True Value 2-Cycle Outboard Oil- AIO Injector or HP Marine

Quaker State

Two-Cycle Oil

Quaker State TC-W3 2-Cycle Engine Oil- AIO Injector

Quicksilver

Two-Cycle Oil

Quicksilver Premium 2-Cycle Outboard Oil- AIO Injector or HP Marine
Quicksilver Premium Plus 2-Cycle Outboard Oil- HP Marine
Quicksilver Direct Injection (DI) 2-Cycle Outboard Oil- HP Marine
Quicksilver Rejuvenate- HP Marine for applications requiring the TC-W3 spec and Interceptor for those requiring API TC
Quicksilver Full Synthetic Two-Stroke PWC and Sport Boat Oil- Interceptor

Four-Cycle Oil

Quicksilver 25W-40 Sterndrive/Inboard Engine Oil- AMSOIL 25W-40 Synthetic-Blend Marine Motor Oil
Quicksilver 25W-40 Synthetic Blend Sterndrive/Inboard Engine Oil- AMSOIL 25W-40 Synthetic-Blend Marine Motor Oil
Quicksilver 25W-40 Full Synthetic Sterndrive/Inboard Engine Oil- AMSOIL 25W-40 Synthetic-Blend Marine Motor Oil
Quicksilver 10W-30 Outboard Engine Oil- AMSOIL 10W-30 4-Stroke Marine Synthetic Motor Oil

Marine Gear Oil

Quicksilver Premium 80W-90 Lower Unit Gear Lube- AMSOIL Universal 75/80W-90 Synthetic Marine Gear Lube
Quicksilver High Performance SAE 90 Lower Unit Gear Lube- AMSOIL Universal 75/80W-90 Synthetic Marine Gear Lube

Valvoline

Two-Cycle Oil

Valvoline 2-Cycle Outboard Marine Oil- AIO Injector or HP Marine

Valmar

Two-Cycle Oil

Valmar Premium 2-Cycle Outboard Oil- AIO Injector or HP Marine

WalMart

Two-Cycle Oil

SuperTech Outboard 2-Cycle Oil- AIO Injector or HP Marine
Tune It! Outboard 2-Cycle Oil- AIO Injector or HP Marine

Marine Gear Oil

SuperTech Marine 80W-90 Lower Unit Gear Lube- AMSOIL Universal 75/80W-90 Synthetic Marine Gear Lube

West Marine

Two-Cycle Oil

West Marine Premium 2-Cycle Outboard Oil- AIO Injector or HP Marine
West Marine DFI Synthetic Blend 2-Cycle Outboard Oil- AIO Injector or HP Marine

Four-Cycle Oil

West Marine Premium 4-Stroke 10W-40 Outboard Oil- AMSOIL 10W-40 4-Stroke Marine Synthetic Motor Oil
West Marine Premium 4-Stroke Synthetic Blend 10W-30 Outboard Oil- AMSOIL 10W-30 4-Stroke Marine Synthetic Motor Oil
West Marine Premium 4-Stroke Synthetic Blend 10W-40 Outboard Oil- AMSOIL 10W-40 4-Stroke Marine Synthetic Motor Oil
West Marine Premium 4-Stroke Synthetic Blend 25W-40 Outboard Oil- AMSOIL 25W-40 Synthetic-Blend Marine Motor Oil
West Marine Premium 4-Stroke Full Synthetic 10W-30 Outboard Oil- AMSOIL 10W-30 4-Stroke Marine Synthetic Motor Oil
West Marine Premium 4-Stroke Full Synthetic 10W-40 Outboard Oil- AMSOIL 10W-40 4-Stroke Marine Synthetic Motor Oil
West Marine Premium 4-Stroke Full Synthetic 20W-40 Outboard Oil- AMSOIL 10W-40 4-Stroke Marine Synthetic Motor Oil

Marine Gear Oil

West Marine Hypoid 90 Lower Unit Gear Oil- AMSOIL Universal 75/80W-90 Synthetic Marine Gear Lube
West Marine PowerPro Synthetic 80W-90 Lower Unit Gear Oil- AMSOIL Universal 75/80W-90 Synthetic Marine Gear Lube

Xcel

Two-Cycle Oil

Xcel Outboard & 2-Cycle TC-W3 RL Engine Oil- AIO Injector or HP Marine
Xcel Universal Outboard & 2-Cycle Engine Oil- AIO Injector

Xtra Rev

Two-Cycle Oil

Xtra Rev TC-W3 2-Cycle Outboard Engine Oil- AIO Injector or HP Marine

Yamaha

Two-Cycle Oil

Yamalube 2M Marine Performance TC-W3 2-Stroke Oil- AIO Injector or HP Marine

Four-Cycle Oil

Yamalube 4M Full Synthetic 5W-30 4-Stroke Marine Engine Oil- AMSOIL 10W-30 4-Stroke Marine Synthetic Motor Oil
Yamalube 4M Marine Performance 10W-30 4-Stroke Engine Oil- AMSOIL 10W-30 4-Stroke Marine Synthetic Motor Oil
Yamalube 4M Marine Performance 20W-40 4-Stroke Engine Oil- AMSOIL 25W-40 Synthetic-Blend Marine Motor Oil

Marine Gear Oil

Yamalube Marine Gearcase Lube HD- AMSOIL Universal 75/80W-90 Synthetic Marine Gear Lube

The videos below will be a treat for vintage motorcycle enthusiasts. Kawasaki is one of the “big-four” Japanese motorcycle manufactures and these videos show us what they were up to in the 1970s. Included are some light-hearted 1970s commercials, 1980 motocross footage and a look at Kawasaki’s design and manufacturing processes from 1972.

Kawasaki Motorcycle History

The Kawasaki motorcycle company is a division of Kawasaki Heavy Industries which is a massive global industrial concern that was founded in 1896. They are involved in enterprises such aircraft/aerospace, trains, power generation, robotics and shipbuilding (just to name a few). Kawasaki became serious about the motorcycle sector when they bought out the Meguro Manufacturing Company in 1964. Meguro was one the first Japanese motorcycle makers and for a time, their sales were second only to Honda. But Meguro hit rough times in the early 1960s and Kawasaki stepped in. With their manufacturing prowess and worldwide corporate leverage, Kawasaki motorcycles quickly became the global player that they are today.

The first video is a montage of Kawasaki TV commercials from the 1970s. The motorcycle market saw a massive expansion in the early 1970s. The Japanese manufacturers really caught their stride during this period and the North American market embraced their inexpensive, reliable bikes. It was a magical time for motorcycle enthusiasts and these commercials really capture the spirit of the times.

This video showcases the KX motocross bikes and the KDX enduro bikes from around 1980. This was actually a watershed moment in motocross history as Kawasaki’s Uni-Trak “rising rate”, single-shock rear suspension debuted at this time. This sparked a design frenzy in the early 1980s as manufacturers released a barrage of wild new rear suspension concepts. Despite this pioneering effort, Kawasaki’s KX series was not very good during this era and was mostly panned by the motorcycle press. Thanks to Koups’ Cycle Shop for putting this up on YouTube.

This video from 1972 takes us on a tour of Kawasaki’s motorcycle design and manufacturing processes at the time. When one considers that Japan was just 27 years beyond complete decimation from World War II, it is truly remarkable how they successfully put all of their recovery efforts into manufacturing and engineering innovation.

AMSOIL has released a new suite of synthetic ATV oils for the ATV/UTV/Side by Side segment. Included is a 5W-50 engine oil for Polaris models, a 10W-40 four-stroke ATV engine oil, a Polaris Demand Drive replacement fluid and a transmission/differential oil. AMSOIL now covers a broad spectrum of ATV applications with these world-class 100% synthetic oils. These products join AMSOIL’s ever-popular Formula 4-Stroke 0W-40 ATV Oil.

AMSOIL Synthetic ATV Oil Series

AMSOIL now offers a specific synthetic oil series for ATVs and Side By Sides. New products include a 5W-50 for Polaris engines, a 10W-40 4-stroke engine oil, a Polaris Demand Drive substitute and a Transmission/Diff Oil.

AMSOIL 5W-50 Synthetic ATV Engine Oil For Polaris

This new synthetic 5W-50 for is suitable for the following 4-stroke Polaris models:

  • Polaris Ranger Side by Side– 300cc, 400cc, 570cc, 800cc and 900cc engines
  • Polaris RZR Side by Side– 570cc, 900cc and 1000cc engines
  • Polaris Sportsman ATV– all engines including 300cc, 400cc, 550cc, 570cc, 600cc, 850cc, 1000cc

AMSOIL 5W-50 is a substitute and upgrade over Polaris PS-4 Engine Oil and PS-4 Extreme Duty Engine Oil. The big advantage of using this AMSOIL 5W-50 over the Polaris PS-4 oils is that AMSOIL designs their oils to be exceptionally shear-stable. This AMSOIL product will hold its viscosity for the duration of its service life, even under the toughest conditions.

AMSOIL 10W-40 Synthetic ATV Engine Oil

This full-synthetic ATV oil is wet-clutch compatible and ideal for any brand of 4-stroke ATV, Side by Side or utility off-road vehicle that requires the use of a 10W-40. This synthetic ATV oil will be a significant upgrade over OEM engine oils found at your dealership and possibly at a better price too.

AMSOIL Synthetic ATV/Side By Side/UTV Front Drive Fluid

This 100% synthetic hilliard clutch/hub fluid is a substitute for Polaris Demand Drive Fluid. Suitable for the Demand Drive 4X4 front ends of Polaris Ranger, RZR, Sportsman and many other ATV models.

AMSOIL Synthetic ATV/Side By Side/UTV Transmission and Differential Fluid

A full-synthetic gear oil for transmissions and differentials in ATVs from brands such as Can-Am, Honda, Kawasaki, Suzuki, Yamaha and more. This gear oil will be suitable for ATV and Side by Side differentials requiring the API GL-5 specification. A substitute for Polaris Angle Drive Fluid and “AGL” Gear Lube.