Quote:
Originally Posted by strat61caster
My FA20 spun a bearing on 5w-30 during an autox, 117k miles, the last 40k miles were on 5w-20, first 75k we’re on 0w-20, sticking with 0W-20 for the second build. ymmv
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Without a shadow of a doubt, I can say the reason the bearing spun had nothing to do with the oil's viscosity numbers.