It seems like I'm agreeing with Jim these days, I'd also say that something
is creating excessive case pressure. Along those lines I just tore down a
horizontally opposed Kohler that was blowing oil from the breather faster
than I could dump it in. It had blown a cylinder barrel seal, not a gasket,
just an RTV seal. The key is that something caused the seal to blow. What
did I find? Cracked exhaust valve guide that allowed exhaust pressures into
the case.

I think a valve wobble test and compression test could shine a lot of light
on your problem.

Jim


"Robert M. Gary" wrote in message
ups.com...
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.
Should I worry about what is causing the extra oil blow out or just
chock it up to an aging engine. I know some engines always blow out to
6ish quarts.
If I shouldn't worry about the extra blow out I'll just put a separator
on it, but I don't want to mask a problem first. One recent change is
we raised the oil pressure since the regulator had been slipping prior
to annual.

-Robert