Robert M. Gary wrote:
I have an IO-360-A3B6 900 SFNEW in '97. I used to be able to keep about
7 quarts in it without it blowing out. Now it seems to be blowing oil
down to about 5.5 quarts. Since I live in the 100F OATs part of the
country, the extra oil really helps cooling.

I don't think a quart of extra oil in the crankcase makes much
difference on cooling. Cooling takes place in the oil cooler, and as
long as you have normal flow through it, it should cool fine.