Even in gasoline engines, this stuff is great! The zinc conditions the aluminum head and the cleaning agents are great in high mileage engines too!

I've used T4 in all my diesel construction for over 20 years. Never a failure to stand -up to the demands we put on it.

I have over 150 thousand miles on my 5.9 Cummins. with nothing but Rotella for my engine oil. Great protection

Wouldn’t wanna run anything else in my truck, others oils don’t last and make the truck run a little funky. 1996 7.3

Bought the 3 gallon eco pack poured into jugs and only had 2 gallon and 3 quarts if they are all like this I'll not be buying anymore!!!!!!!!!!!

I use it in all my small engines sae30 and t4 in my powersports. Never lets me down

Same oil at Sam's Club is running for $74.-

A solid performer for my diesel truck. I use it all the time

The type of oil required for our vehicle.

Needed the oil and appreciated the price and free shipping.