My engine runs best on 20-50 petroleum
oil. I have a moderate to more aggressive build and solid lifters. The
synthetic stuff just did not perform well in this engine. I use the Valvoline racing
oil and am pretty satisfied with it.
Oil pressure is solid. On a more aggressive build the rings can be a little undersized to decrease friction andincrease horsepower, which then increase the amount of oil that is left on the cylinder walls to be burned. A thinner oil tends to leave even more oil for burning.
I have heard that
synthetic oils are not made to be burned and that this can cause problems in an engine. Has anyone else heard this? Cannot recall who told me that.