Thanks for the update, Dan, and glad it is not anything serious. Someone
said that as long as the engine makes full power and doesn't make metal,
don't worry about compressions etc. Presumably that covers black oil too.

Stan


"Dan Luke" wrote in message
...
"Stan Prevost" wrote:

So, Dan, how did this turn out?


Friday, I took the airplane to Teledyne Continental's shop in Fairhope, AL
for a "second opinion" on the engine.

Just got the report: the engine seems fine. Compressions are ok,
crankcase pressure is ok, cylinders all looked good when bore-scoped.

This mechanic said the same thing my regular mechanic said about the dirty
oil: it most likely came from the oil cooler and associated plumbing which
doesn't get drained at oil change unless you pull a line off the cooler.

--
Dan
C-172RG at BFM