How fast does it burn oil? My engine had fine compression but the valve
hardware was worn out. The oil got black real quick. Let me guess.....
there was a period of inactivity? Do you foul plugs? When was the last
overhaul? In my case, the overhaul was 17 years old. It finally hiccuped
in cruise flight. I had it overhauled.

"Dan Luke" wrote in message
...

wrote:

Definitely have an A&P borescope that engine. Broken ring maybe.

Talked to my mechanic this morning. He said not to worry; the dirty oil
is from the oil cooler and its plumbing, which don't get drained when the
oil is changed.

He said I would have noticed this before if I had ever checked it two
hours after a change. Since I check the oil before every flight, it seems
I would have noticed the oil's turning black this soon before.

Should I pay to have the cylinders 'scoped?

--
Dan
C-172RG at BFM