w/goose neck. You must log in or register to reply here. TheDieselStop.Com Moderator & Former Photo Editor Had a May '02 F350 7.3L SC Lariat 4x4 Auto. Test... what approvals has that Delvac (or CAT re label) lost ? The engine rolls over noticably quicker with the T6 too. are beyond my capabilities. If they allow a FA-4 oil, choose Shell Rotella T5 Ultra 10W-30. The bottles retain a much-preferred two-handled design for easy pouring and the thinner dimension that fits easily on retail shelves, in a shop or truck. ), 4th Gens Powder Coated Black & Some 315/70R17 Trail Grapplers. which happens to be t6 for some years now. Delvac 1300 is now listed as a 'synthetic blend' - not because of a formula change, but a marketing lingo change....It has the approvals - and it certainly has the track record of great performance. For a better experience, please enable JavaScript in your browser before proceeding. The logical naming structure of T4 to T5 to T6 and the Triple Protection identifier makes each engine oil easy to identify. Swapped out the oil with some Rotella and well 2 years later that slipping never occured again. For a better experience, please enable JavaScript in your browser before proceeding. I have a 2005 Silverado 2500 with LLY duramax diesel. I have used Mobil 1 for every oil change since it was new. This synthetic oil holds up better to the torture of the turbo. Both run flawless. As engine manufacturers create a new generation of  more fuel-efficient diesel engines that produce lower amounts of carbon dioxide, they need a new generation of higher-performing diesel engine oils to protect them. For a 2017 on-highway vehicle; check with the manufacturer before changing the oil for the first time. Next Last. around here there is rimula t4 which is ci-4 plus not ck-4. But you must have one he** of a truck mine is a finicky bit** and would probably have me walking for less. Insurance in outrageous working temperatures 3. In fact, Company/product listings on this page DO NOT imply endorsement by the site operator. Synthetic doesn't break down as easy or as soon. It is designed for improved fuel economy vs. Rotella CK-4 oils while offering equivalent wear protection to CK-4 products. The price is a bargain relative to "motorcycle oils". I own a 1998 one owner Dodge PU with the Cummins Turbo Diesel. I sold my 2001 F250 7.3L PSD to my sons best friend 18 months ago with 298k miles on her 1/2 her life running Rotella T6 5W-40! 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. Rotella T6 is Shell's Fully Synthetic oil and only comes in 5W40 Rotella T5 is Shell's Synthetic Blend oil, It comes in both 10W30 or 10W40 Looking for info?? Shell Lubricants has introduced a new portfolio of Shell Rotella heavy-duty diesel engine oils. This oil does exactely what its supposed to do! Shell Rotella ® T4 Triple Protection 15W-40 is designed to provide hardworking protection that adapts to your driving conditions. Well, there are more people that run Dino oil that have erection than don't from what I have seen. 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. 1 of 2 Go to page. Being a 5W-40 this oil starts easier in cold weather than petro oils. Shell Rotella ® T4 15W-40. They are the most technologically advanced Shell Rotella engine oils ever and also offer the protection required by diesel engine manufacturers, Shell sources report. Gave it a shot of rev-x on the last change, too. Engine is quieter, runs smoother, and stays cooler. High ZDDP extends the life of engines that have high pressure sliding surfaces, which is more common in high compression engines. I can say that the engine is slightly quieter with this oil. Except as expressly set forth in our Terms of Use, all representations and warranties regarding the information presented on this page are disclaimed.