I've been changing oil every 5000 miles using Shell Rotella since 2000 in my Ford 7.3 diesel and am very satisfied with this oil. Have not had any oil related problems what ever. Pulled bumper and 5th wheel trailers through Colorado mountains: a horse trailer up steep rocky roads in Missouri. This truck is used hard, Rotella is my oil.

The Turbo Diesel Register did an in depth analysis of a wide range of died engine oils,including some very pricey synthetics. I had just purchased my first diesel,a '02 Dodge 24valve Cummins,and was researching what oil to use. I run Amsoil products in my Harley and was surprised to find that the Rotella T ranked in the top 5 of this analysis. It can be viewed on the Geno'garage website /Tech information. I change my oil at 10k mile intervals and I am sure if I had it tested, it could go further. Great product.

I was concerned when I heard shell discontinued production of Triple Protection Rotella. This is my second oil change with this oil and I run it for 5000-7000 miles. UOA show great additive packs and the wear metals in my samples have decreased since the change to T4. Great oil and a great company. I've been using Rotella since the Rotella-T days.

I bought this truck almost 5 years ago it had 85,000 miles on it when I bought it it now has 123,000 and I have been using Rotella 15/40 - T-4 and have always change my oil at around 5,000 miles and i see most people don’t change their oil until 7,500 or more it’s been awesome I love the oil and the protection that it has, But I have got a question about the T-5 will it harm my engine if I wanna switch to synthetic T-5 or would I be better off staying with T-4 ?????

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.

I live in Canada and store my oil in an unheated shop. Twice I have cracked open a new 5 gal oil pale, dumped it into an engine and had table spoon sized ice chunks come out. The oil is good quality but the pales allow moisture to get in. Use a screen.

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.

I have been using this high quality oil in my Ford Turbocharged F250 Diesel for years. My pickup requires 14 qts of 15W40 motor oil so using one 2.5 gal bottle along with a 1 gal bottle (also bought at Walmart) reaches the required 14 qt capacity. Through looking at local stores on online, Walmart provided the best price.

My 1994 F350 7.3L with 270k seemed to idle a little rougher running T3 but when I took the leap on running T4 I couldn’t be happier. My diesel runs like a brand new truck and no more leaking! My truck has been brought to a new level with Shell Rotella T4 15w-40 ! Very excited to see how she runs the next 3 to 4k miles ! Definitely an eye opening experience in my journey with this truck .

The oil is good. But the price is too high.