My oil salesman tells me Rotella 15w40 & Valvoline Racing oil still has the max allowed zinc. Lucas makes an engine break in additive I sell often here-part # is 10063


My \'64\'s in the Gallery
Pictures in my Photobucket
1964 C10 Custom Cab 350/700R4
1964 Suburban 350/700R4
1979 Ford F350 4x4 400/c6