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Professional White Man
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I went to Autozone today for my daily oil purchase, and noticed that 50w and 60w were called high performance, and was wondering why that is.

a sidenote: will switching to a thicker oil help reduce oil leaks passed tired rings?
 

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The thicker heavier oils have a tendency to stick to the internals of the motor better, giving better lubrication on moving parts. Its less likely to fling, so alot of the guys around here with dirt track race cars use straight 50 wt because there always at a high rpm.

- Ross
 

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Higher viscosity results in increased hydrodynamic pressure being developed in the main/rod bearings. The more pressure developed, the more force that can applied before bearing/journal contact occurs.
 
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