another zinc additive thread

[mcditalia]

Yes, I started talking to a NAPA guy today and besides being a fellow vette guy, he swears by Lucas Engine Break-In Additive - Zinc Plus. Convinced by his story I decided to buy a 16oz bottle.

It seems that this topic has been widely discussed in the past, especially in the NCRS forums. So from what I gather from my reading on the subject, any oil with over 1,600 ppm zddp is just as bad as the current SM rated oil with far less. I called Lucas and spoke to a rep who told me that the zddp level of their product mixed with 5 quarts of typical sm oil will be about 5,200ppm zddp:eek, but their product is intended for "break in procedures", so i can't imagine running this in between my oil changes for a fully broken in motor.

I have a nice bottle for sale of this stuff if anyone wants it.:eyerole CJ-4 anyone?

 

[Hib Halverson]

You are wise to sell that additive. Too much ZDP is almost as bad as not enough. All you'll even need to know about EP additives and engine oil is right here on the CAC.
See: CAC's Comprehensive Look at Engine Oil