I think he's talking about http://www.racerpartswholesale.com/cooler.htm this type of cooler where the "fins" are the passages. Either way theres no reason to compromise your motor. Beyond the fact that the cooler has to hold the pressure of the oil. There is a point where too thin or too thick would be not the most efficient.
And theres your level. Chump.....
And theres your level. Chump.....




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