SF versus SL 10W-30 oil.

Reply to
Toller
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I've seen the same symptoms with QS.

Reply to
Steve Barker

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 deposits.

KC

Reply to
KC

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