Understanding Diesel Oil Filtration
Approximately 75% of the contaminants trapped by the oil filter are combustion byproducts, like soot and sludge.
New API-Licensed CK-4 And FA-4 Diesel Engine Oils Are Now Available
The American Petroleum Institute has licensed approximately 400 CK-4 and more than 60 FA-4 oils submitted by large, medium and small oil marketers.
