Earl Findlay
Active Member
A simple survey on stuck valves, and the oil type in use when they occurred. For the purpose of this survey, I am only interest in AeroShell vs Phillips, and whether each was in use at the time of a stuck valve.
Check out the column by Mike Busch in this months AOPA Pilot magazine. His contention is that it is more frequent when you are running cooler CHT's (like LOP operation).
The information in the poll will be useless unless you also know the proportion of owners using the two different oils.
Dave
Mike Busch's article ("Why valves stick") in the July 2020 issue of AOPA Pilot magazine posits that sticky valves are caused by lead oxybromides and not by carbonized oil. This is based on information from Ed Kollin. Mike argues that the sweet spot for CHT's, especially in Lycomings, is between 350 and 400 Degrees F to minimize valve sticking. And he explains why Continental's seem to be less prone to valve sticking than Lycoming's.
The article is definitely worth a read, whichever theory you subscribe to.
The information in the poll will be useless unless you also know the proportion of owners using the two different oils.
Dave
I think he?s playing with Y?all again.