Synthetic Oil FAQ

Switching From Petroleum to Synthetic

  • I heard that new cars require a break in period with petroleum before you switch them to synthetic. How long should this break in period be?
  • If I convert from petroleum motor oil to synthetic motor oil, will it clean the sludge from my engine and cause plugging of the oil filter and passageways?
  • Is it true that installing AMSOIL or other synthetic oils will cause my engine to leak oil?

General Questions and Answers

How can I purchase AMSOIL products?

You can order products directly online by clicking on the Online Store Link (you will pay full retail prices). The best option is to get an AMSOIL Wholesale Account. We have options for individuals, retailers and commercial accounts. Orders are shipped from the nearest or 13 North American Distribution Centres.

What are your shipping rates?

While we have posted approximate shipping rates, these are ballpark numbers only. Shipping rates constantly fluctuate and there are far too many regional variables at play. Please feel free to contact us with an approximate order size along with your postal or zip code and we will be happy to get you a quote.

Will using AMSOIL Engine Flush in motorcycle engines damage the wet clutch?

Engine & Transmission Flush may not be compatible with wet clutch systems and the generally small oil capacities of motorcycles can easily allow over dilution of the oil. Therefore we do NOT recommend the use of engine flush for motorcycle applications.

Can AMSOIL Motor Oils be recycled?

Regarding used synthetic oils, they can be recycled in the same manner as a petroleum-based motor oils. Synthetic oils can also be used in furnaces designed to burn waste oils.

What AMSOIL products should I use for my Harley Davidson motorcycle?

Check out our Harley-Davidson Product Application Guide

Motor Oil Recommendations For 2007 or Newer Diesel Pick-ups

If you have a 2007 or newer diesel pick-up that requires a motor oil with the API CJ-4 specification, we offer 3 products that fill that bill.

All 3 products have a drain interval as specified by your owners manual in 2007 and newer trucks. See more in the Service Bulletin: TSB: Fuel Dilution Issues in 2007-10 Light-Duty Diesel Trucks. In diesels older than 2007, the Premium DEO and DME products can be in service for up to 3X the interval recommended by your owners manual.

Shock Therapy Suspension Fluid Question

What is the actual oil weight for the following suspension fluids: STL – Shock Therapy Light and STM – Shock Therapy Medium? Shock Therapy Light corresponds to a 5 wt. and Shock Therapy Medium corresponds to a 10 wt.

Can I use AMSOIL 0W-40 in my new 4-stroke snowmobile?

Absolutely! AMSOIL AFF 0W-40 was specifically formulated for use in small, hard working 4-stroke engines. AFF is ideal for 4-cycle snowmobiles, ATV’s, personal watercraft, 4-stroke boat motors, lawn equipment etc…

How long have AMSOIL lubricants been on the market?

AMSOIL introduced the first synthetic motor oil with an API (American Petroleum Institute) Service Classification in 1972. Since that time, AMSOIL has varied and expanded its product line.

What are AMSOIL Synthetic Motor Oils?

AMSOIL Synthetic Lubricants are fuel efficient, extended life lubricants manufactured from select synthetic base stocks and special purpose additives. These lubricants provide improved overall performance characteristics when compared to conventional petroleum oils.

Can AMSOIL Motor Oils be used in any engine?

Certainly, AMSOIL Motor Oils may be used in any mechanically sound gasoline or diesel fueled engine. Basically, that means they are excellent for use in any vehicle’s engine.

Will AMSOIL Motor Oils void the warranty of a new vehicle?

Absolutely not! Manufacturers’ warranties are based upon the use of oils meeting specific API Service Classifications, for example, SM. AMSOIL motor oils meet or exceed these specifications. If you are uncomfortable with the long drain intervals suggested for the Signature Series motor oils, take a look at the OE Series (OEM drain interval) or the XL Series (6 months or 10,000 miles). Both lines are API licensed and warranty approved.

Are AMSOIL Motor Oils All-Season Oils?

Synthetic oils are made to protect and perform better than petroleum oils at both high and low temperature extremes. That’s why every jet engine in the world is lubricated with synthetic oil. AMSOIL Motor Oils have extremely low pour points and flow readily at extremely low temperatures for easier winter starting and significantly reduced engine wear. At high temperatures, no conventional motor oil can compare to the overall protection AMSOIL Synthetic Motor Oils provide. That’s extremely important for today’s turbocharged and small, non-turbocharged engines!

Will using AMSOIL Motor Oils increase gas mileage?

Tighter government regulations and increases in engine manufacturers’ demands are calling for more fuel efficient lubricants. AMSOIL Motor Oils reduce friction and drag better than petroleum oils, resulting in significant fuel economy increases. In a recent 1.2 million mile demonstration, AMSOIL Lubricants showed a 4.5% increase in gas mileage. Other tests have shown increases of as much as 15% under certain weather and driving conditions. Yet, because every vehicle is different, as are driving habits and conditions, it is difficult to accurately project an exact increase.

Are AMSOIL Motor Oils compatible with other motor oils?

Yes. AMSOIL Motor Oils are compatible with all other synthetic or petroleum motor oils.

Why are AMSOIL Motor Oils capable of extended drain intervals?

AMSOIL Synthetic Motor Oils are highly resistant to the destructive effects of heat, and do not break down like petroleum oils. This means that AMSOIL Motor Oils can provide much longer drain intervals than conventional lubricants.

Will AMSOIL Motor Oils decrease oil consumption?

In many cases. When used in mechanically sound engines, AMSOIL Motor Oils can reduce oil consumption. Under test conditions, a reduction of as much as 42% was demonstrated for prolonged periods. However, this should not be taken to mean that AMSOIL Motor Oils are “cure-alls” for engines that consume oil because of mechanical problems.

Is there a recommended procedure for changing to AMSOIL Motor Oils?

There are no special requirements; however, in older vehicles or those with high mileage, it may be advisable to use AMSOIL Engine Flush first. This will ensure that the engine is clean and free of any accumulated contaminants which might have an effect on the service life of AMSOIL Motor Oils. In all cases, it is good judgment to install a new AMSOIL Ea Oil Filter (EAO) every time you change oil.

Should Oil Additives or After Market Products be added to AMSOIL Motor Oils?

No, they are not necessary! AMSOIL Motor Oils are properly formulated under the strictest Quality Control procedure to provide superior lubrication performance.

Is it true that installing AMSOIL or other synthetic oils will cause my engine to leak oil?

In modern vehicles, there is no risk of AMSOIL motor oil leaking. In fact, AMSOIL motor oil is fully compatible with modern seal materials. It is properly formulated to condition seals, keeping them pliable to prevent leakage.

I heard that new cars require a break in period with petroleum before you switch them to synthetic. How long should this break in period be?

AMSOIL Synthetic Motor Oil can be used during break-in trouble free. In fact, vehicles such as Dodge Viper and Chevrolet Corvette come factory filled with synthetic oil.
Since most new vehicles come filled with petroleum oil, it only makes good sense to change to AMSOIL at the first scheduled oil change interval. New engine components generate high levels of wear metals and can contain contaminants from assembly. By allowing the engine to operate with the petroleum oil until the first oil/filter change interval, the wear metals and contaminants are removed prior to installing AMSOIL.

If I convert from petroleum motor oil to synthetic motor oil, will it clean the sludge from my engine and cause plugging of the oil filter and passageways?

Absolutely not. Switching from petroleum oil to AMSOIL in routinely maintained vehicles will not cause clogged oil filters or passageways, regardless of mileage. Sludge, which is caused by poor quality oil and neglected maintenance practices, would have to be present in significant amounts to plug oil filters and passageways. If this excessive amount of sludge is present in an engine, it is just a matter of time before oil filters and passageways clog, regardless of the installation of AMSOIL.