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

Great oil I run it in my 2012 Silverado duramax. I had a whine noise from the oil pump and now the noise is gone, Ill keep using this product

Its oil, and its contained, what else is there to say.

The best oil money can buy!!

On time great product thanks

I like that oil very much,(addicted to it) tried this oil in different cars, works perfect Ram 3500 Cummins 6.7, towing Goosneck, got 20000 miles of oil change. Mersedes ML350 Bluetec 15000 of oil changes, analyzing oil after 30 to 52 % life left.

I love the oil but am very disappointed in the condition it was received.

Good product from a reputable company

Theirs no better oil on the market

So, I started using this product in my fleet since the Supreme 9000 5W-40 CJ-4 is not recommended for newer EGR/SCR equipped vehicles. Two things Ive noticed: 1. The oil stays cleaner much longer 2. The buses use much less DEF. Because this is made by Schaeffers, I trust that the durability will hold up and keep my equipment running for many miles.

AS A TECH I HAVE SEEN WHAT THIS OIL CAN DO TO A ENGINE AND I WILL NOT USE THIS OIL IN ANYTHING !