Is Special Oil Needed For Vintage Snowmobile Engines?

ByMarc Roden

A reader asks: I’ve got a fleet of restored snowmobiles from the 1970’s and early 1980’s. Regarding 2-stroke oil, I see that there is now a Polaris Vintage 2-Stroke Oil available. Would this product be my best choice? Our answer: First off, we have no data or test information on Polaris Vintage 2-Stroke Oil. We…

Is It OK To Replace 5W-20 With 0W-20 Motor Oil?

ByMarc Roden

A reader asks: My car is supposed to use 5W-20 motor oil. I accidentally bought 0W-20 and did an oil change without noticing. Is it safe to continue running the 0W-20? Our answer: In most cases, 0W-20 is a perfectly acceptable substitute for 5W-20. Both products are 20-weight motor oils at operating temperatures. However, the…

Which AMSOIL Bypass Filter System For Semi-Tractor Engine?

ByMarc Roden

A reader asks: I am looking for a bit of advice on an oil bypass filter system. What is the difference between the AMSOIL BMK22-EA Dual Gard Bypass System and BMK30 Heavy-Duty Bypass System? This is for a highway tractor pulling super B’s. This unit would probably be logging about 95,000 miles (150,000 km) per…

Can You Switch From Synthetic To Conventional Oil In A Harley?

ByMarc Roden

A reader asks: A shop did some work on my Harley-Davidson and filled my primary with synthetic oil. I have always used regular H-D oil. Can I drain it and replace with regular oil? Will this cause any problems? Our answer: You can safely drain the synthetic oil and go back to conventional oil (but…

Can Synthetic ATF Be Used In Older Cars?

ByMarc Roden

A common question is whether synthetic ATF can be used in classic cars? Yes, synthetic automatic transmission fluid is certainly compatible with older transmissions. It can provide a nice performance and protection upgrade. Synthetic ATF will have similar viscosity and frictional properties to conventional ATF. Make sure to purchase an ATF meeting the correct specification…

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How To Find The Right ATF For Older Cars

ByMarc Roden

If you are looking for an automatic transmission fluid for that classic car or truck, finding the correct ATF product may be confusing. Modern ATF labels likely do not list ATF specifications that have been obsolete for decades. But we can help. We carry a selection of ATF products that meet most all vintage ATF…

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Can You Use AMSOIL Dominator 2-Stroke Oil In An Outboard Motor?

ByMarc Roden

A reader asks: Is it OK to use AMSOIL Dominator 2-Stroke Racing Oil in my Johnson 15-horsepower outboard engine? Our answer: No, AMSOIL Dominator would not be an appropriate choice for your outboard engine. AMSOIL has a few outstanding options for your outboard motors (see below). Dominator is a great oil for racing, but not…