The faster a good oil film gets established on the cam, the less chance
there is of lifter damage. Anything under 60 degrees carries some risk.
We preheat below 40. A single cold start when it is really cold can
damage a lifter.

Which always leads me to this same question: Does anyone here have a
"pre-oiler" installed in their airplane?

It would seem so logical, yet I've never met anyone with one installed
(other than on big warbird engines...).
--
Jay Honeck
Iowa City, IA
Pathfinder N56993
www.AlexisParkInn.com
"Your Aviation Destination"