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

We use this oil exclusively with our Diesel Trucks because its good quality but for some reason I cant get Amazon to deliver it anymore. They keep giving me the excuse its undeliverable each time. So I guess I will have to get my product elsewhere.

Love this oil Only oil I will run in my truck from now on Starts up better and runs quieter

Very expensive,I am dissatisfied ,my motor is now louder than it was before, especially when cold.I just dont see me using and pay in extra in the future for this product

Swapped to schaeffers from Rotella 15w40 and noticed increased oil pressure, slightly better fuel economy, and a quite engine. I was quite impressed. Its really good oil, but... the downside is the price, I recommend going through a nearby sales rep as the prices are exponentially cheaper than buying from a 3rd party vendor such as Amazon, Napa, O Reillys etc.

Best oil for Ford 6.7 Powerstroke, hands down.

I run this in my 2015 F250 6.7. They actually sent the correct oil this time. Change oil and filter every 5k miles.

Its the best. Love Schaeffers oil

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

Good product from a reputable company

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.