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Registered
Join Date: May 2001
Location: Peoples Republic of Long Beach, NY
Posts: 21,140
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I use M-1 15w-50 based on the higher temps that it can handle before toasting. Upper piston ring land heat makes me nervious.
based on a 5yr old comparison chart that I lost.
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Ronin LB
'77 911s 2.7
PMO E 8.5
SSI Monty
MSD JPI
w x6
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