I have been using Rotella T ever since I bought my Dodge RAM diesel in 2006. The truck is used on the ranch and often on rugged terrain. For years commuted from Houston every weekend so lots of highway driving. Exceptional oil for my Cummins diesel.

Although this product has many modern applications, I use Rotella 15W-40 and 10W-30 in all my antique tractors that call for 30 and 40 weight oil. It's much better than what they've been run on for the bulk of their life and has no doubt extended the lives of their old engines.

Good baby product

I have been using Shell Rotella 15w-40 for my diesels for about 10 years now, and I am very satisfied with the performance of this oil. I have had no problems with it at all!

My wife and I are boaters and each fall we change the oil in our Diesel engines and the generator. Each year we need 10 gallons and purchasing 4 of these and having the delivered to the store made it very easy for us. Thanks Walmart

I and many others I know use this oil because it has the high zinc we need for flat tappet cams. I have a 1972 Plymouth Roadrunner with a 440 and so far no problems.

I've used Rotella T4 15-40 in my 1300cc liquid cooled motorcycle for years because of its heat hadling capabilities and wear resistance. Very pleased with the results and does not compromise the clutch action.

Use this in my '06 Duramax LBZ/ my air cooled 4 stroke engines(lawnmowers/generators), and all of my 4 stroke dirt bikes. Superior to any non-synthetic oil I have ever used. Recommended to all my friends/acquaintances.

This is the only oil I have run in my 2001 Ford F-250 Superduty 7.3 diesel. I now have 248K miles on it and it runs like it was new. I would never try any other oil..

An excellent product for the gear box of your off-road motorcycle. You get a gallon for the price of a quart of boutique oils. I have run Rotella for 15 years and never a problem. I get long clutch and bearing life.