So your concern is what?
This clearly illustrates why blown/turbo cars MUST change oil more frequently because the high compression pressures cause more blow-by and quickly contaminates oil in the crankcase.
It only takes 20-25 passes in my race car using Sunoco 116 completely turn the oil gray and not useable any longer, and I use a mechanical vacuum pump to evacuate my crankcase pressure.
This is another reason why synthetic oils are a complete waste of $$$ in our turbo cars on the street or strip, as oil gets contaminated LONG before it can "wear out".
Personally, I think you are doing the right thing as I use a mix of 110 leaded in my street car, and recommend my customers do the same thing. I have already changed enough head gaskets to last 10 lifetimes, so I do not need any additional work at this point. :biggrin:
Depending of the use, a turbo car may need to change oil at less than 1000 street miles, which is cheap insurance to protect an expensive engine investment.
In my race car, I change rings/bearing at about 275-300 9 sec. passes, and have yet to trash a bearing since I installed the first TA production alum block years ago!
