Shell Rotella T6 Full Synthetic 15W-40 Diesel Engine Oil, 1 Gallon (3 Pack)

Great and proven oil! And price is better then parts stores. However when shipped the lids were not completely tighted causing to leak in box.

Not all the T6 is rated for wet clutch. This 15W40 is. Good price, good oil, and have been using T6 for about 3 decades in various motorcycles. While it is rated for wet clutch, they do not have the seal. Not paying for the seal doesn't mean it isn't great. Not paying un-needed expenses saves us the additional cost.

First delivery, the bottle cap had been cracked from mishandling I assume, and it leaked everywhere. I don't understand why they deliver something so messy. They left it on my stoop so the oil could leak on my new 20 thousand dollar 2 story paver stoop. So thank you for that Amazon delivery guy for ruining the finish of my pavers. We're going to have to replace the top pavers. I'm unbelievably annoyed by this. Amazon did replace the oil, so I'll only be out like 2000 dollars I guess. But back to the oil. This is the only oil that my 1987 Mercedes 300D will run on properly without lifter clatter. I recommend it to anyone who has an old diesel. My engine purrs like it's brand new.

Good stuff. Too bad Amazon half the time refunds my money because either them or the post office decides to destroy the bottle getting oil all over it and anything else I also ordered with it. I recommend ordering it separately just in case unless you like the hassle of many refunds. Still worth it. You can’t beat the price here.

Unopened box arrived in perfect condition. I use this in my motorcycles because it has the correct additives for a wet clutch, and also for my diesel truck. It has worked great, and I would highly recommend it. You can fudge a bit on oil weight depending on the climate you live in. Old motorcycle manuals used to have a chart for what oil weight you should use at what temperature, but most newer motorcycle manuals don't have that. If your bike calls for 10w-40, then 15w-40 is probably fine too unless you're starting it in very cold conditions. (Not legal advise) I got this for $65 for a 3 pack of 1 gallon jugs of 15w-40 in Feb 2026, but it looks like the price fluctuates a lot.

About a year ago I switched to Shell Rotella Full Synthetic 15W-40 for my 1980 and 1981 Suzuki GS650 bikes. In my bikes and a lot of other Japanese-motorcycles the engine and transmission share the same oil-and I noticeable an improvement in shifting in both of my bikes, cooler running engines too. It’s substantially cheaper than most synthetic motorcycle oils. It has the MA rating and is widely available at Walmart, auto stores, and truck stops, or you can get it in one day with Amazon prime.

I Run this in our LML Duramax and our Case skid steer. We never have any problems with it.

This is some good oil, but I had to keep adding it to my truck and tractor. If I use Delo, I never have to add between oil changes.

The only oil i'll use in my L5P Duramax.

Super oil for my motorcycles!

This product is rated for high pressure in transmissions and clutches running in the engine oil also. It is rated JASO MA which is what is called for in a lot of Japanese bikes and cheaper than the dealer supplied oils that have the same rating.

Has better oil pressure and it stays clean for a long time It’s in a CaseIH Mx 230 farm tractor 8.3 litre communes

This is one of the most popular diesel engine oil’s available.I pretty much use this in my diesel Passat and Benz E320 Bluetec as well as my GM trucks.Rotella T has always proven itself as a leader.