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

For Hubbys stuff..

Best oil on the market it’s the only oil I’ve used in my medium and heavy duty trucks.

I have used this oil in my 2007 6.0 ever since I changed my injectors. Having used Mobil 1, Rotella T4 & T6, Amsoil, and Royal Purple, I obviously have a preference for high quality synthetic oils. This is the best oil I have ever used. Also the most expensive. Zero stiction issues with this oil.

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

excellent

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!!!

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

Love this oil. Great quality

After 2 hours run time its still clean.

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