Great oil, run it in our Briggs animal kart motors on methonal... Keeps the motor at cooler running temps

We run this in our imca 604 crate engine works great

Works great in my supercharged Vette!

Great product and customer service

Necessary to maintain the 1966 396 engine in my Super Sport. Full synthetic has many added values over conventional oil especially in cars that get low mileage, irregular usage.

Great oil for my 60 yr old car, I also amsoil in modern cars better fuel mileage

I use Amsoil in all my vehicles. Bought this for my 1977 Ford F-250 after the top end of the original 351M was rebuilt. Thought it would be the right choice for this classic motor. Time will tell.

I use this oil in a pair of merc 540's, which have been dyno'd over 600hp. It's the only oil I will use and with over 300 hours on these engines, this says it all.

Great oil for BMW airheads

This goes into my '69 Corvette, 427 internal protection is the target for this oil. I like the rust inhibitor that is present to protect the internal components of the engine when it is inactive and the over all protection when I take her out for a drive. A good oil at a good price.

I've used Amsoil for years in all my diesels now it's time for my old cars too. Great product and I'm very happy with the results

I've tried a number of different motor oils over the years. Mobil 1, Royal Purple and a few others. Amsoil Z-Rod is definitely the best oil I've ever used in my Reher Morrison Chevy 540 big block. The engine maintains a higher oil pressure even on a hot day! Appears I've gained additional horsepower also! Provides peace of mind knowing my motor is protected and producing maximum power!

Perfect weight for a big block Chev, doesn't blow through the motor while racing, like similar oils do. Great product from a great company

The only oil I'll use in my racecars

If you dont want to wipe out cam lobes, USE THIS PRODUCT!!!!!!!!!!!!!

I have been running Amsoil in my last 3 cars I love it and the protection it offers!

Bought it for a 73 mustang. Love the product.

Perfect for a air cool VW

I bought this oil based on the fact that it has extra added Zinc for flat tappet cams generally used in hot rod motors and the fact it is known in the hobby to be excellent oil.

I use this product in my 1952 M38A1 Willy's Army Jeep The engine runs quiet and smooth with this oil