Quote:
Originally Posted by Bobby Fazio
How about when you have Sherman or Smith "hydraulic" roller lifters? Can thinner oils be counterproductive?
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All I can tell you is back when we had hydraulics in the LT1 car we were using Lucas 10-30 full synthetic race oil. Decided to try RP 5-30 and twice a couple rockers came loose. Went back to the Lucas 10-30 problem went away.