Originally Posted by 01b3000ds
It may be marketed as "diesel/ tractor" oil, but it meets or in this case exceeds the specification Ford has published for oiling this engine. The additives do nice things. I'm getting 25Mpg combined running it.
i know , it is a damn good engine oil even if it is marketed for diesel engines
i ran diesel engine oil in 2 of my old jeep cj7 straight 6 engines , the engines ran cooler and stronger than with regular engine oil
just do not use it in brand new engines , also not to be used in gasoline engines in colder temperature areas