
03-11-2010, 06:12 AM
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Senior Club Cobra Member
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Join Date: Mar 2001
Location: Southern Connecticut,
CT
Cobra Make, Engine: SPF - 351W, 944 non-turbo
Posts: 2,105
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Not Ranked
CobraEd:
The ad you linked is misleading.
"After 70+ years, the EPA mandated that all domestic oil producers remove ZDDP (Zinc Dialkyl Dithio Phosphate) from all conventional and synthetic motor oil."
ZDDP levels have been reduced. For overhead cam engines the lower levels probably don't matter. For us flat tappet guys it does.
Bob
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