Quote:
Originally Posted by TJ's Chevy
For a straight 6 run Straight 30 with a zinc additive. In the cooler times of the year run a 10w-30 with additive.
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An Old drag racer guy told me to run 30 weight... I think I might do straight 30 or 40 weight or possibly 20w/50 wine it's a old motor and the fan wiggles a little when it's off, so I'm thinking the bearings are wearing out, so that might tell me that other parts are worn... So that might make me go with the thinker oil