If you are new to AMSOIL products or synthetic oils in general and are thinking of converting your motorcycle, here are some commonly asked questions and answers. If your question isn’t here, contact us with the form on the right or call us at 1-800-748-5781 and we will be happy to help.

What viscosity grades of AMSOIL Synthetic Motorcycle Oils are available?

20W-50, 10W-40, 10W-30, 0W-40, SAE 60 and even a 10W-40 for Scooters.

What are benefits of synthetic motorcycle oil?

  • Low friction for increased power and efficiency
  • Cool operation and resistance to extreme heat
  • Smooth shifting and outstanding gear protection
  • Resistance to extreme heat and viscosity breakdown
  • Reduced oil consumption
  • Capable of extended service life
  • Rust/corrosion inhibitors for storage protection

Is synthetic motorcycle oil worth the extra cost over regular motorcycle oil?

We’ve just covered the many benefits and will submit that AMSOIL Synthetic Motorcycle Oil is the most cost-effective upgrade you can make to your motorcycle. It’s even more cost effective with our wholesale pricing. Our faithful customers agree.

Is there any downside to using synthetic motorcycle oil?

Absolutely none. AMSOIL Synthetic Motorcycle Oils are designed to be superior to conventional motorcycle oil in every aspect.

Does synthetic oil cause wet clutch problems?

AMSOIL Synthetic Motorcycle Oils are 100% compatible with wet-clutches. In fact they are more “clutch friendly” than most conventional motorcycle oils because of superior heat resistance. The base oil (be it synthetic or conventional) has nothing to do with a motorcycle oil’s wet-clutch compatibility. Friction modifiers found in automotive engine oils (both conventional and synthetic) will cause wet clutch problems such as slippage and clutch plate glazing. Oils designed specifically for motorcycles do not contain friction modifiers. Read more in our article Does Synthetic Motorcycle Oil Cause Wet Clutch Problems?.

Do I need to use an AMSOIL Ea Motorcycle Oil Filter with AMSOIL Synthetic Motorcycle Oils?

No. Any oil filter that is suitable for your motorcycle will work. BUT, the AMSOIL Ea Motorcycle Oil Filters offer some elite benefits that can complement AMSOIL synthetic oils. First, they offer industry-leading protection with an efficiency rating of 98.7% at 15 microns. Second, they are constructed with high-quality components for long service intervals. As the AMSOIL motorcycle oils are capable of long service life, why not use an oil filter that is designed for long life as well?

Is AMSOIL Synthetic Motorcycle Oil compatible with regular motorcycle oil?

Yes. Any remnants of conventional motorcycle oil left in your engine or transmission will not cause any problems. AMSOIL Synthetic Oils are completely compatible with regular oils.

Do you offer AMSOIL for my ATV or Side by Side?

Yes for any brand. Do you have a Polaris ATV that requires a 2W-50 engine oil or an Arctic Cat that requires 5W-50? Our AMSOIL Formula 4-Stroke Powersports 0W-40 Synthetic Oil replaces both of these products and offers much steadier protection.  Read how AMSOIL 0W-40 Replaces Arctic Cat 5W-50 and Polaris 2W-50. AMSOIL Powersports 0W-40 is also suitable for Honda®, Yamaha®, Bombardier®, Suzuki® and Kawasaki® ATV’s.

What other motorcycle products do you offer beside oil and filters?

Two-stroke oil, suspension fluid, octane boost, fuel additives, NGK spark plugs, synthetic water resistant grease and much more. See the complete AMSOIL Motorcycle Product Line.

Which specific AMSOIL products are suitable for my motorcycle?

Find the correct AMSOIL Motorcycle Oil, filter, NGK spark plug and other related products for your exact model in our Motorcycle Application Guide.

How can I buy AMSOIL Synthetic Motorcycle Oil in Canada or the US at the best possible price?

We can offer the best pricing available to Canadian or US customers with our AMSOIL wholesale programs. We ship from 2 warehouses in Canada and 11 in the US. Contact us for wholesale pricing with the contact form (above right) or call us at 1-800-748-5781.

Harley-Davidson Specific Questions

Can I use 20w-50 in the engine, transmission and primary chaincase of my Harley?

Yes, yes and yes! AMSOIL 20W-50 is designed for cool, smooth operation in Harley engines, but it is also equipped with extreme pressure additives for outstanding wear control of gears and chains. It is a “no-compromise” oil for all three holes.

How does AMSOIL Motorcycle Oil compare to Harley-Davidson Motorcycle Oil?

Our customers tell us about better performance, cooler operation and dramatically lower oil consumption versus Harley oil. Our testing shows superior wear protection and better resistance to high-heat viscosity shearing. Read more at AMSOIL 20W-50 & SAE 60 vs. Harley Motorcycle Oil.

Should I use a gear lube instead of 20W-50 motorcycle oil in my Harley transmission?

There is no need. As mentioned, AMSOIL 20W-50 contains a generous amount of extreme pressure (EP) additives to resist metal-to-metal contact. It also delivers smooth shifting and cool transmission operation. Some riders use Severe Gear 75W-110 or 75W-140 for their transmissions (which is perfectly fine), but there are no clear-cut benefits over the 20W-50. See our article Should I Use 20W-50 or Gear Lube in My Harley Transmission?.

What AMSOIL products can be used in my Harley-Davidson?

Check out our suggestions in the Top 5 AMSOIL Products for Harley-Davidson Motorcycles.

Can AMSOIL Synthetic Oil cause Harley-Davidson cam roller bearing problems?

There has been a persistent rumor that synthetic oil is so “slippery” that is causes cam roller bearings in some Harley engines to “skate” or “float”. We examine this completely false premise in our article Does Synthetic Oil Cause Harley Cam Roller Bearing Problems?.