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Posted by jimmymac392 on Saturday, December 08, 2007 at 07:54:07 :
In Reply to: Anyone familiar with ZDDP oil additive? posted by Mark in NJ on Friday, December 07, 2007 at 01:19:07 :
I read on an oil test web site (duramax?) that STP in the red bottle has the most Zinc per dollar spent, blue bottle was next. Using one bottle per five quarts will bring Shell Rotella almost back to pre USLD levels. There are a few specialty additives coming out and a few specialty,racing oils (pricy)around. GM breakin oil is one of the best,add to every oil change.