wrote in message
oups.com...
After six years trying to figure out were the leak came from and after
many thousands of dollars spent. My O-300 is still leaking the same,
one quart every four hours of flight. I believe I can live with that.
The best option to solve this problem I believe is to replace the
engine with an O-360.

I find it impossible to believe a 1 quart per 4 hour leak cannot be found.
A leak that major would coat the entire fuselage in minutes. A tablespoon
of oil can spread over a very large area and make it seem like a major leak.
I assume you took it to several A&Ps over the six years.