Shell Rotella 5W-40-offer valid for in store oil change only

I have a 17 year old Volvo TAMD41P-A diesel in my 31' recreational trawler. Prior engine oils for the prior owner (11 years) and me have been 15-40 dino oils, until I switched to full synthetic engine oil, also 15-40. Operating temperature dropped 5 degrees at standard cruising RPM of 1800 to 2200 (only one of two thermostats in place most of that time), the engine runs quieter and more smoothly. Based on research I have found, I know that my engine is running cleaner, with other attributes of reduced internal corrosion, less wear, etc. After installing 2 new thermostats, the engine runs precisely on specification for operating temperature through the full range of RPM, right up to wide open throttle, 3800 (end of the day 10 minute spike to clean the exhaust system ). Further, smoke when starting is greatly diminished to almost zero. I am completely satisfied that I am doing all that I can to accomplish optimal engine performance and protection with Rotella T6 over the last two years, and I am comfortable recommending Rotella T6 to boating friends with diesels, confident in the cost/benefit of using the best oil quality, grade and viscosity for my application.

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.

I used to run this oil in my Victory Cross Country, but I did feel the clutch slipping from time to time. Like most Harley guy's, I was very finicky with how I maintain my bike. I purchased an S&S 124CI kit for my Road Glide and was waiting for the parts to arrive. I still needed to ride until then, but my bike needed an oil change so I took the chance because I knew how well my Victory ran with it, plus I was just trying to be cheap since I had to dump the oil anyway for the new motor build and I didn't have to worry about it slipping because I did not use it on the primary or transmission side. At the end of the day I'm glad I tried it and I love it so much, Im selling the 124CI and gonna be content with just a Cam upgrade. The bike runs so smooth, quite and MPG went up. Its like a brand new bike with 34k miles on it. I will continue to run this as motor oil and use recommended oil for the primary and transmission going forward. This product is the best thing the shelf.

In 2002, I purchased a new Volkswagen GTI with a 200 hp 2.8 liter V6 engine. The manual advised the use of 5W-30, but preferred 5W-40. I did not live near a metro area and the only 5W-40 I could find was Rotella T. I have used this oil ever since and never had an oil related problem. The engine does not use oil, so I never have to top up between 5000 mile oil changes. I had to change the valve cover gasket recently and was pleased to find no shellacking inside the head or valve cover. What residue was there could be wiped away with a cloth.

This is a truly excellent oil that has the ratings and approvals for all my vehicles, gasoline, diesel, air and liquid cooled. Rotella T6 is the only oil I buy for my cars, trucks, tractors, ATV's, UTV's, ZTR's, gasoline and diesel powered generators, a power washer, log splitter and other small gasoline, air cooled engines, basically everything except 2-stroke gasoline engines. I love only having to buy one engine oil.