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[Dave1massey at cs.com]

In a message dated 10/23/2008 1:10:53 PM Central Daylight Time, 
chris.ngala at iwayafrica.com writes: 
> Dave,
> What is zddp?
> 
Zinc dithiophosphates are additives to reduce wear in engines with solid (not 
roller) cam followers.
http://en.wikipedia.org/wiki/ZDDP
There is a lot of discussion and a fair amount of folklore surrounding the 
topic.

But that may not be an issue where you live.

Dave