Best oil period for my original flat tappet L-82 Corvette.

I have used this in my 1987 Silverado 5.0 with 250,000 miles on it for the last 20 years and, I still get 4500 miles to a quart and the engine is still quiet and has never been opened. Very happy with Amsoil!

ALL THE PRODUCTS PREFORM AS EXPECTED

I use this in my 90k mile evo to help combat the effects for e85

I drive my 68 Dart 2 dr sedan constantly !!!! Literally !!!! It is small block mild with 3 speed auto. And Z Rod Is All I run It Along With Synthetic oil filter and go air filter all AMS Oil Products!!! Recommend it to Everyone !!

Use this in my 1934 Ford Pro Street Pickup, With a 406 Small Block Chevy making in excess of 500 HP, Run it in very Hot Weather in the summer going to car Shows and Cruise nights, Preforms well with this oil, no problems at all, Love it.

The best for vintage engines!

Used this in my air cooled 911 trans. Much more smooth shifting.

I have a 1989 Toyota pickup that I have owned since new. I use only Amsoil products in my vehicles and am happy to say that the old pickup has 370,000 miles now and still runs like it did when new. Consider me a very, very happy customer!

I switched to ZROD oil for my vintage gto mainly for the zinc/phosphorus content. when I did I changed from a competitors 10w40 to amsoil 20w50 because of oil usage (believed to be valve seal related) and oil consumption decreased significantly.

Used in a hot rod

I've driven VW Super Beetles for the last 35 years, and once the engines are broken in I've always switched over to Amsoil. And considering that I lived in the Southwest all of that time and 1st generation VW's are only cooled by Air and Oil; it made Amsoil a must. With it's ability to keep engine temps much lower and wear and tear down to a minimum it's been an easy decision.

This oil has lots of ZDDP. To protect my Cam and lifters. The 20W-50 I like because l run it in my air cooled engine. Even on a hot day with the Engine at temp of 280' I still have 30# of oil pressure. I also run Amsoil gear lube in the transaxle. I'm sold Amsoil products.