Schaeffer Manufacturing Co. 0700CK4-006S SynShield Durability Advantage 15W-40 Diesel Engine Oil, 1-Gallon Bottle

I only use this in my Cummins. Kinda expensive but you get what you pay for. My truck seems to run better and sounds better

Great oil, it is a little hard to get sometimes, but overall, really good oil for a diesel truck. At times, I have had my orders in the past that didn't show up and had to reorder." 2 different times"

Excellent diesel oil. Spent a few hours watching videos on oil analysis for diesel oil. Schaeffers is top tier and has one of the best anti wear additive packages on the market.

Running on my 08 2500 Ram on temperature above 85f , best oil ever

Best stuff for my husbands GMC, his mechanic told him to use it.

Marketable price on a superior product.

I like it for my car. It works well. Good quality and good value.

Some people do not know how great this oil is at protecting their engines…In independent studies & test it is proven to preform equally to Amsoil.In the wear testing it outperforms Amsoil by a significant margin. Combine that with the price & this oil can’t be beat!!