My '99 Honda Valkyrie motorcycle, '02 BMW 1150GS motorbike, '91 Lexus LS400 and '04 Dodge 3500 diesel, all use Rotella synthetic. It is so nice to keep one oil for everything and still find that excellent cold weather starting and hot summer oil pressures are still great. I recommend this product without reservation.

I have been using Rotella in my 1997 Ford F-250 since I bought the truck new in 1997. I switched from T-4 to T-6 a few years ago and only use about 4 oz of oil between changes every 5000 miles. The truck starts much easier in cold weather. I have 178,000 miles on the truck and I have no oil leaks.

Okay folks, I have a 1990 miata. Bad lifter tick like baaaaaaaaaaad lifter tick. It was ticking louder than the clock did in high school when it was the end of the day and you just wanted to go home so you were aimlessly starring at it waiting for it to hit 60. ANYWAYS, i did an oil change on it and used this, cause everyone in the Miata community swears by it. After it was all said and done I went on a little cruise and oh my god. It's gone. No more ticking nothing. And I swear my little Miata is running better than it ever has before. A1 stuff man

I have 146000 on my f350 recently replaced all the injectors, when we pulled the valve covers off I was impressed they looked like new no sludge or anything. I remember 40 years ago my father in law told me to use shell Rotella if you want a clean engine. He was right.

how do i keep adding stars..its stops me at 5. I discovered t6 10w30 in desperate attempt to keep it running as a gasoline engine. not only did it keep it running it revived it reswelling gaskets and getting a superiors oil too the top of heads that completely stopped all lifter ticking, smoothed out rough running vibration, from regular oils, increased fuel economy and increased performance in a engine had i put conventional 10w30 was certainly doomed to die without T6. So when i bought my my truck it was automatic gonna run T6 5W30 and i experimented running the dealership oil, added oil catch can system within a week oil found in catch can & darkened alot and lifters we're beginning to be heard by 2weeks it had used half quart from towing. I dumped dealship oil new full synthetic filter and T6 5w30 in a 4cylinder turbo gasoline engine cleaned oil catch can.. Immediately improved lifter noise and smoothed motor running, again noticable fuel economy gains and horseplay increased, motor ran snappy and smooth the turbo stopped using oil and spooled faster smoother and oil catch can barely had oil vaper inside. ran in 6,000 miles and oil was still on good shape.. your t6 product is Top tier anyone wanting half million miles on engine this oil one of the only options best oil for my demanding driving by a longshot, keep up the excellence Shell I rave about your products to everyone!

Started using Shell 5w40 T-6 in my Cummins 2 years year round. Very happy with it. Even in -30 C the engine starts fairly easy and the gauge shows oil pressure right away. Also use the Shell 15w40 in my motorcycles with the wet clutch . This oil has the JASO MA rating for wet clutch applications to prevent the clutch from slipping. Oil with the JASO-MA does not have the additive which makes the oil extra slippery for engine oil applications. I have also used the 15w40 in my vehicle engines in the summer. Very happy with the result.

2023 F250 Diesel. My truck lives this oil and yours will too.

[This review was collected as part of a promotion.] Excellent oil

This product is know to be best for my needs

[This review was collected as part of a promotion.] Great product and best price point