Ordered a case of oil, got it within a couple days. Everything was in good condition and oil made everything run smooth.

Have been using Dominator 15w50 in my small displacement high-rev race motors for years and have had no lubrication-related failures. Great with flat tappet cams -

WELL I HAVE GOOD LUCK WITH ALL THE AMSOIL PRODUCTS. I HAVE USED THIS IN MY 1980 Z/28 WITH GET SERVICE FOR 20YEARS. THANKS JPK

been using this product for years in my drag car excellent results

I am new to using Amsoil, I have know about the product since the 70s, i was looking for a quality oil to use in my race cars, when i pored the oil it looked so thin, but the oil pressure only changed about 5 psi. and my car did not change much in ET from the last out, and the weather was 20 degrees warmer and the DA was 2500 ft higher, so i am very happy with the oil.

Great oil in our scca world challenge built road racing protege

I have been using this product for 5 years in my classic car since the engine was new (454 GM crate engine). Very pleased with this oil & with over 5,000 miles driven, I will continue to use it as long as I own the car.

I have a 1964 Chevy Corvair. I decided to switch from regular oil to synthetic. The Z-Rod was perfect for my needs.

I wouldn’t trust my racing engine to anything else !

have not been using enough to rate product. sorry

Works great in my 25 year old Hydraulic flat tappet 360 ! 236,000 and counting, runs awesome !

I run this oil in my older daily driver because of the high amount of ZDDP in this oil. Great product with great shipping department. I ordered on a Wednesday, and I had my oil on Friday!!!

New engine. Engine is running great. First time I use in a car. I always use Amsoil in my Harley.

I use it in my lawn tractor with overhead valves. My tractor now starts quicker and runs smoother. The extra additives in this works great for my twin 23 hrs mower.

Nothing but AMSOIL Break in oil first Now this oil, bearings, camshaft, Roller Lifters all look great. My Lifters have over 1000 passes on them. Still working perfectly with AMSOIL..!!!

Impossible to review engine oil without some kind of lab analysis but the engine is still running so... 5 stars?

This is an awesome racing oil. I have a 2006 6.0 GTO and with this oil I believe it has gained at least 25 HP. Smooth and so much quicker than with the standard synthetic brands. I was really surprised by the difference. This is all I will run from now on.

I have been using Z-Rod motor oil for around 10 years in my street rods, both engines have been running silky smooth with no harsh noise conditions. I have never had any overheat problems or power stress incidents. Highly recommend this blend in your tappet valve engine.

Will order again

I have used this oil for several years and my engine is in perfect shape. 700 HP drag racing engine.