FYI Winter Oil Temps

[CATERHAM]

My Porsche 928 has a removable sump cover but I've always left it on as the 9 litre sump takes forever to get up to temp' even in the summer.

I've though about installing a sump cover on my BMW and I really should. I did make a sump shroud to cover the heavily finned ali' sump on my Caterham which stays on year round. I only remove it for track days. Without it, the finned sump is simply too efficient at keeping the oil temp's low; it's like having a non thermostatically controlled oil cooler.

 

[steve20]

I took advantage of our warm (68 degree) temps yesterday and started up the 95 Corvette. Engine is a stock LT-1 with iron block, aluminum heads, and GM's reverse flow cooling (coolant goes from the radiator directly to the heads, and not the block as would be considered normal) I took readings every 10 degrees of coolant temp increase, here's a few to give you an idea of how long it really takes to warm up
ambient garage air = 57F
900 rpm steady idle maintained
at 120 coolant temp, you start to feel warm air thru the vents
oil temp 60 coolant temp 120
oil temp 80 coolant temp 150
oil temp 140 coolant 180 (t-stat opens)
oil temp 160 coolant 200
oil temp 190 coolant 230 then coolant fan starts)