Schaeffer Manufacturing Co. 0700CK4-012 SynShield Durability Advantage 15W-40 Diesel Engine Oil, 12-Quart Bottle (Pack of 12)

Good oil.Had it before, but dropped after ingine start eating oil.Since bouthg different semi start using again.

Would give this 10 stars if I could. Oil makes my Cummins a lot more quiter. Doesnt shiver like a chiwawa anymore and oil change intervals now at 7k miles.

I tried this due to not being able to find Rottela T5 in the stores. For me this will be a permanent switch. My 6.0 starts easier runs quieter and seems to get a little better fuel milage.

Really good oil 5/5

On time great product thanks

Use exclusively in my 2017 Ford 6.7 powerstroke. Great oil.

Read a lot of great things about this oil for use in my 6.0 PSD, just towed my travel trailer to Charleston SC and ran very well,oil temps alw a ys good even though we were in 95 ambient temps running 60-65 mph.

This stuff is the best on the market for a 6.0 Diesel. I’m crazy I have sat for hours reading forums about the most asked about ,debated and discussed topic……best oil for my 6.0 diesel. I’ve literally tried Shell non synthetic and full synthetic Ford OEM oil and a few others. This with with Archoil AR91000 along with some form of ZDDP additive is hands down the best lubricant package you could ever put in this F-250 6.0 diesel period. STOP SEARCHING AND WASTING YOUR TIME IVE DONE THAT FOR YOU ALREADY!! Just pull the trigger!! PS Use OEM oil filter ONLY and change fuel filters every other oil change!!!

Best oil on the market. Its costly but worth it to keep your motor lubed and clean. This has revived my old 01’ Dodge Ram 2500 Cummins.

After 2 hours run time its still clean.