Love this oil!

Have used this from the get-go for all my gas rigs. Before that, used in all fleet gas rigs before retirement. Always the best you can use. Hands down.

Don’t buy any other oil for your car besides amsoil

I only use amsoil in my truck and Harley, there's nothing better I think,been using it for years, absolutely no regrets excellent oil

I had a custom SBC race engine built and had issues with Cams going flat. First cam went flat after break-in and switching to OTC oil. Second cam went flat after 6000 miles on break-in oil and switching to Tier 1 Synthetic oil (which was guaranteed to work with my cam and lifters). Rebuilt entire engine for a 3rd time and started running Amsoil 10W-40 high zinc. 7 years later the engine is still running strong and makes same HP as the day it came off the dyno. I also run this oil in my truck, which pulls a racecar trailer on a weekly basis.

Use this in my 26 year old F350. Still runs like new. It's my farm truck.

great oil for my old big block ford highly recommend

Fast shipping and fantastic customer service. Will definitely be buying again

got a new car they said 20-50 I said Amsoil

I’ve almost always used BMW recommended products for my car. As I know my motor is higher compression and extended service intervals, I’ve chosen 20W50 Amsoil. This product is awesome and has met and exceeded my high standards.

Indisputably the best for our 1982 VW Westfailia Vanagon camp mobile!!

Been using Amsoil products for over 25 years. Would never use any other oil.

Would not hesitate to purchase any Amsoil product. I have a 1994 F350 with 200K plus miles and running strong thanks to Amsoil products.

Used in a motorhome with 1600kms so still a few MKS to go, but so far , very happy with the oil

Use in air cooled Porsche. Excellent oil with zinc additives for older engines.

Use in air cooled Porsche. Excellent oil with zinc additives for older engines.

This is the oil I use in my lawnmowers , The oil looks brand new every time I change it . They start and run like they are brand new !

I use this in the new 383 stroker engine in my 71 Nova, does a great job!

The best oil I have ever used for my 2003 Jeep WJ 4.0.

Amsoil AMO high zinc full synthetic is the recommended oil for my cars engine . The 90-95 Corvette ZR1 needs an oil with the correct additive package of zinc and phosphorus. It's LT5 engine with 4 cams, flat tappets , and 32 valves needs an oil that meets the manufacturers requirements. That oil use to be Mobil 1 full synthetic. Mobile 1 has reduced the zinc and phosphorus package in their current oil. Most new engines have roller valve train and they also reduced the package over catalytic converter life concerns. My engine builder recommends the Amsoil AMO product. It meets the original manufacturer recommendation . I use only Amsoil in all my cars . Especially my Corvette ZR1 with its exotic 528 horse power LT5 . It's cheap insurance .