what kind of oil for new rebuild

Duster318 I agree and would add that not all oils are "slippery snake oil" additives some additives are there just to add compounds to the oil like the Moly you talk about DTK, is that not an additive?

I have never seen any test that shows synthetic oils have less heat dissipation qualities that petroleum oils and if you have I would be very interested in reading such a test.

Aeration is introducing air into a liquid, how does putting in a liquid additive aerate oil? If you are talking about viscosity additives that makes the oil thicker and harder to pump which could cause air to be extracted from the oil itself, then that would be cavitation and yes that would be bad. I don't feel there is a need for viscosity adders either, if a thicker oil is needed change viscosities of the oil itself.

DTK, you made a reference to building 1500hp engines, I guessing those aren't using flat tappet cams.


Chuck