Originally Posted by DirtyD
You are right. I failed to realize that when talking earlier. A heavier weight oil is definitely something to have if you do some sort of racing on the weekends though.
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To an extent I agree. I can see race oil being benficial at the track in some very hot weather with a heavier weight but there is a point where it is detrimental as increased flow will result in increased cooling by the oil. This is a good thing. You would probably want more oil flow in these situations and you get it. The hotter oil thins and this increases flow. The higher flow works harder to separate the engine parts that are under very high stress. It all works out for the better. Higher revving engines need thinner oils. You do not necessarily need to go to a thicker oil while racing. Only experimentation will tell.