|
Registered
Join Date: Aug 2002
Location: Galivants Ferry, SC
Posts: 10,550
|
I've often heard ( engine rebuilders on this list please confirm) that he upper-most area of the piston sees the most heat. This is understandable as its in the flame path of ignition. Accordingly, the upper-most piston ring takes a terrible beating, and cars running synthetic tend to have upper rings, and/or ring grooves in the piston in better shape. Temps here go to ( please confirm , again) 600 degF, as I recall. If correct, normal oils will coke and cake at this temp and syns will typically hold up better.
--Wil Ferch
PS---I've posted the temps of the various white/red lines on the un-numbered gauges for mid 80's gauges on the list before....can be approximated by 150/200/250/300 degF starting from the first white block ( not line) and going up.
__________________
Wil Ferch
85 Carrera ( gone, but not forgotten )
|