FAQ about ZDDP Oil Additives & Cam Lube
ZPlus ZDDP FAQs
In the API (American Petroleum Institute) classification system, “S” and “C” are the two basic application categories of oil. “S” is intended for gasoline use and “C” is intended for diesel use.
“A” was the first grade in each category and resulted in “SA” and “CA” grade oils. Each designation progressed farther up the alphabet as new grades of oil were introduced. The newest grades are “SM” and “CJ” respectively. “SF” was for 1988 and older engines.
ZDDPlus™ is an oil supplement that contains very high concentrations of the well-known additive ZDDP (Zinc Dialkyl Dithiophosphate), which has been the primary EP (extreme pressure) ingredient in all quality motor oils for over 70 years. However, beginning in the late 1980s, the concentration has been greatly reduced as newer oil classifications have come on the market.