[DeTomaso] ZDDP zinc oil additive

[Barry Seib]

ZDDPlus additive looks good and there are also other alternatives. I have
heard that current API designations for diesels (I think it's CF2) also have
very little ZDDP left in them as catalytic convertors have been introduced
on diesels as well last year.

I'm told the only oils that must have the ZDDP reduced to unacceptable
levels for our engines are those that meet API SL and SM and the current API
diesel designations.

Word is that motorcycle oil without an API is good to go with lots of ZDDP
because motorcycles don't require API rated oil and their engines require
extreme pressure additives (ZDDP). Racing oil without an API SL or SM on it
could also contain a lot of ZDDP if the producer so chooses. You don't want
racing oil with SL or SM on it!

This looks like a promissing alternative as well:

http://www.bradpennracing.com/

Barry