Been using Rotella synthetic for years used in cars trucks and motorcycles since new 87 kawasaki concours 1000 60,000 miles + 93 Pontiac Bonneville into 130,000 Yamaha V-Max 19,000 miles, 2009 Chevrolet Avalanche 202,000 miles, also used it in Kaw.Concours 1400 and Piaggio BV250 Scooter, ULTIMATE PROTECTION!!!

Using it in a semi tractor with cummins engine, with this oil and a bypass oil filter, i can extend the oil changes to 100,000 miles, well i do a oil test everytime i change bypass oil filter (every 10,000 miles), and so far the test returned showing oil in good condition.

Used T6 in my 2007 FZ1 since I bought it used about four years ago. I rev this bike to the Max, never had a single engine problem, doesn't run hot, uses zero oil in between changes. I understand that it shears easily in a wet clutch situation (as do many oils) so I change it as I reach about 1k or 1.2k miles that way the engine always gets fresh oil. It's cheap and not that hard to change oil and filter. I only ride for fun so I change it maybe a couple of times a year.

I have been running shell oil since I bought my duramax in 2002, the truck has been used for construction in northern Alberta in the oilfield it’s entire life. Big trailers, -30C morning starts, working lots of hours , Shell’s fluids have never let me down. The truck has 800000 km- 12000 engine hours on it and the engine runs as good as it did the day I drove it off the lot. Doesn’t use any oil at all from oil change to oil change. I Switched to t6 at 400000km and run the 5w40 year round. I change oil every 5-6000 km. If your looking for the best fluids to run in your diesel pick up this is it.

Been using for years in Motorcycle, gas and diesel motors. First used for my motorcycle then started using in everything else to keep it simple. Seems a waste for diesel w/ 3 mos. oil changes low hour tractor. I believe it is a highly engineered lubricant available in some form, throughout the world. (almost)

This Shell Rotella T6 5w-40 Synthetic engine oil is both a quality product and very affordable for 4-stroke motorcycles which use 10w-40 conventional engine oil. After the auto supply store where I had bought conventional oil for my motorcycle raised the price to an outlandish level I found this very reasonably priced Shell Rotella synthetic oil at Walmart, and it is has the JASO-MA rating which indicates that it is also formulated for wet clutch motorcycles. I have been using it in my Kawasaki Vulcan 900 Classic LT for some time with zero oil consumption, and on my oil pressure gauge it registers according to the Kawasaki shop manual spec regarding pressure.

Have been running T-6 5W40 since 2011. Never had an issue getting the oil. Now I have had my first oil change in my 6.7 PSD and had to use Mobil Diesel oil. 5,000 miles in and can hear a difference in the sound of the engine. So, shell when I get my oil sample back will you still honor your engine warrant since I was not able to get your oil ? Yes seriously I miss your oil and hurry the heck up and get t-6 to us!!

I have been studying everything I can get my hands on pertaining to oil and I am convinced Shell who lena Pennzoil and Quakerstate as well as Rotella line of oil has teacher a far superior oils for piston drive motors then anyone else. Because of my finding , I will be using only Shell oils in all my fleet of vehicle s.

I have a 05’ Chevy D max since new. Dino oil that came with it for the 10,000 break in and changed it with T6 ever since. C’mon, you cannot see what is happening inside you engine unless you break it down. The premise of using a good quality synthetic motor oil is based on the comfort that you WON’T have to break it down because you know that oil is making sure your engine is getting lubed. Diesel engines are quite expensive so putting the best oil in equates to as little wear as possible. I use a bypass oil filter (installed at 10,000 mile oil change) which gives my T6 the absolute best filtration. Engine has run great and, at 93k still sounds as new. Don’t even think twice about using T6 in your diesel. Everybody has their pet brand. For me it’s shell T6.

Rotella T-6 is a sleeper in the motorcycle world. I have run it in an XR250 dirt bike off road (which is a serious test of how it works in a wet clutch.), a Honda VFR800 sport bike and a Honda Shadow cruiser. Zero problems or issues of any kind. Blackstone lab analysis showed a very good additive package and essentially zero wear after a hard run in the sport bike. This oil is JASO MA rated for wet clutches. The price is a bargain relative to "motorcycle oils". Being a 5W-40 this oil starts easier in cold weather than petro oils. I also use it in a generator and my gas powered pick up truck. This is possibly the most versatile motor oil made. Excellent stuff. (No... I don't work for Shell oil !!)