Engine Oil Supplement with Zinc Treatment, PN 4401, will make new oils backward compatible with older engines. Designed for gasoline engines 1997 and older as well as diesel engines 2006 and older. The Zinc and Phosphorous (ZDDP) treatment will put back into new oils what the older oils contained to properly lubricate and protect those gasoline and diesel engines.
Restores ZDDP Zinc & Phosphorus levels to prevent camshaft, valvetrain and other engine damage.
Makes newer oils work in older engines.
Rislone Oil Stabilizer with Engine Treatment
FUNCTION - Increases Oil Pressure, Eliminates Dry Starts
