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

Top of the line oil for the Powerstroke.

Good product from a reputable company

Reproductor Muy Bueno pero noso responsables con la devolu cion de dinero

Its green

This stuff is in fact.. the cats MEOW!! I would only recommend this formula for cooler climates before running it myself, but it in fact holds its own in severe heat as well! It holds slightly more oil pressure than Rotella 10W-40 at the same temperature! I’m pleased! I’m running this in everything I own now!

Quicker cold starts. Cooler rung temps during heavy hauling.

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

Not very impressed so far. The oil has 3000 miles on it and the 7.3 was filled slightly over the top line on the dipstick before leaving for a 300 mile trip. My truck is ridiculously maintained and has never burned oil in its 240,000 mile life. Pulled into camp, parked and all was good. Next morning it would not fire up! Checked the oil level and was a little below 3/4, added a gallon of delo and it fired up of course after getting oil up to proper levels. In case you dont know, low oil and your injectors wont fire with ford 6.0 and 7.3, awesome system as you wont ever ruin an engine due to low oil. Obviously I do have an issue possibly with a low pressure oil pump but the oil should not burn off like this. No signs, smoke or running problems indicating an issue on the drive. Im disappointed especially after reading all the reviews on the forums over the years and finally getting to try this oil. It ran just slightly better than my regular oil for a few months and then now it runs rough like the oil is old just over 3000 miles. Will not be buying again and am sticking to locally bought oil

Theirs no better oil on the market

This is a good oil, but it is very expensive for the value. Lucas Oil 10299 SAE 15W-40 CJ-4 Synthetic Motor Oil works just as good for half the cost. Schaeffer oil is good but not worth the extra cost.