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)

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.

I have been using Rotella T in my Goldwing motorcycle since it was new in 1995. 225,000 miles later, no clutch problems, and my bike uses 4 oz of oil every 10,000 - 12,000 miles, when it is due for a fresh batch. I change it once a year, whether it needs it or not! Good Stuff, wish they made it in correct weights for my car and pickup. I settle for Pennzoil Ultra Full Synthetic in them, but always wish for Rotella Synthetics! I also use Rotella T in lawn, snow, and garden equipment, where heavy duty use is important. Same change intervals, once a year.

I ran this oil in my Toyota Corolla for 10,000 miles, and had it tested by Blackstone Labs, and the amount of wear in those 10,000 miles was so low that it almost could not be measured, and Blackstone said that the oil was still pristine, and that I could easily run it for another 5,000 miles.

I use it in a 2007 Honda Rancher ES and it always starts right up like a champ. No slippage nothing I can't complain. I drive this bike hard and change the oil once per year or longer. Checked it the other day after like 13 months still looks ok could use a change so I'm going to do it. I'll probably use Rotella T6 again. It seems to be good stuff.

bike is a 2008 Suzuki Boulevard C90...Perfect. Great clutch feel and shift effort is nil. No ticking in the engine. and the cost is amazing. And on my 2016 Ram EcoDiesel, the factory oil was running almost one hundred dollars (10.5Qt required), now that Ram said "OK" to Rotella, im down around 60US! Awesome

Like others who reviewed T6, I have used this in my bikes for years, as do the group of guys I ride with regularly. Never had a problem and performance is excellent. Even at 5,000 mile between oil changes it comes out of the bike looking like fresh new oil. Much more cost effective than motorcycle specific synthetic products too. Try it, you won't be disappointed!

i have buying t6 full synth 15-40 for my two powerstroke 05 ford 6.0 diesel and 08 ford 6.4 diesel in my 6.0 engine i change every 2000 and at the most 3000 miles and because after 1000 the shearing is very noticable at 500 miles its completely black i now the 6liter are hard on oil but i have spent well in the thousands in oil changes just year rotella t6 nothing else

I use this oil in my car's GDI engine and I know several people who love using it in their high performance Subaru engines like that of the STi, WRX, and Forester XT. It just doesn't shear like other 5W-30 oils often do. I am very happy that Shell offers this product but it is very difficult to find in stores and usually online retailers offer it at a more premium price. I hope it is made more commonly available in the future!

Just bought a 2002 Kawasaki Concours motorcycle and the previous owner swears by this oil. Did some extensive research and online Concours forums questioning, this is THE stuff for improved cold starts, better shifting, and overall performance. Try buying full synthetic from motorcycle shop for anywhere near what Walmart is charging for this oil!