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

Regards,
Bud

On Jan 28, 7:02 am, "Dan Luke" wrote:
The oil in my Lyc. O-360 F1A6 is black only two hours after being changed.

What could be causing this? Compressions were in the 70s at annual in
September.

--
Dan
C172RG at BFM