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if i go .003 on rods and mains both, and run a 50w or 20-50 oil this will be ok on a bracket motor? thanks guys

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I run those clearances or looser with thinner oil The single wieght oil can make as much as 10 HP loss or gain depending on oil temp. differences, that is why I run 5w20 or 5w30 in my motors now. 10 HP is usually a tenth of a second defference at the track