LIQUI MOLY Touring High Tech Diesel Specialoil SAE 15W-40 | 5 L | Touring engine oil | SKU: 2044

Works great. I use it in my V8 Duramax with 270k miles. Doesn't loose a drop between oil changes, alwys looks good when changed a 7500 miles.

WOW!!! F-250 2001 7.3 PowerstrokeHonestly made it and sounds like a brand new engine. After properly done research regarding the oil codes / spec CK-4 for newer style engines, oils are more focused nowdays with DPF and other high tech components in mind, I emailed Liqui Moly customer service and they suggested this oil spec and viscosity, all I can say forget about any other synthetic oil brand I've tried Mobil, T6 Shell, Valvoline, and I will only buy Liqui Moly for the rest of my life, I FINALLY FOUND AN OIL BRAND THAT I FEEL 100% satisfied.The engine is extremely quieter and I just have aa few hundreds of miles into the LM oil but there is a lot of good benefits I've seen, heard the iddling is music to the ears and the cabin is really about 40% quieter must be from the previous T6 5w40 that was just replaced, oil seems tacky great protection, and consumption prevention, be prepare to take out your hpop reservoir oil out and refilling it with new for less contaminants.DONT OVERTHINK IT I AM A SPECIFICATIONS FREAK AND I AM LIQUI MOLY FOR LIFE NOW.

My 3 year old Cummins 6.7 with low milage seems to run a bit quieter and smoother. I have noticed a small increase in milage (maybe 0.5 mpg) but again subjective. I have always used synthetic oils in my engines and will certainly continue to use Liqui Moly and their Ceretec additive in this motor.

Less internal friction, better fuel mileage.

This oil will NOT hold up for a 7.3 past 2k miles. I'm not sure if it's due to the high pressure of the HEUI system that is causing foaming or just shearing. Initially ran great, after a 1k miles, started running different. At 2k miles, my truck was running like crap. Changed oil back to motorcraft, 15 miles down the highway, and truck was once again running great.Probably my own fault for running an oil not meeding FORD specs, but it is disappointing to spend so much money only to essentially dump it down the drain plug.

I love this stuff. I run it in all of my rigs. My wifes acura, out little truck and this stuff in my 2015 Ram cummins.

I really feel good about using this motor oil. Only complaint is that it got a little lost in the mail. But showed up in good order.

Wow! New F-350 truck after an oil change. Never seen anything like it, faster response, goes quicker. Not cheap, but worth it