Conversly, I rebuilt a Chevy 350 that had been run on Havoline for 90k
miles. It was shiney inside with little-to-no sludge. Guess that's
why the oil looks black after 500 miles - it's really collecting those
Also for an air cooled/flat tappet engine you might want to look for a
"fleet" oil (both gasoline and Diesel rated) and also one NOT rated CJ-4
(the latest Diesel rating.) The newest oils actually have fewer zinc
compounds (usually ZDDP, an anti-wear additive) per the new specs.
A motorcycle oil might be a good choice, as well...
replace "roosters" with "cox" to reply.
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