I own a 1986 Porsche 930 with a 3.3L air-cooled turbo engine. I am trying to decide between M1 0W-40 and 15W-50 for the car. I don't drive the car particularly hard.
I am a real novice in this area but do know that these engines tend to run hot and that air-cooled engines rely on oil cooling more than water-cooled engines. That's pretty much the extent of my knowledge.
The car never gets driven in the winter. Summer temps are in the 80s and 90s. Any thoughts on oil choice? What's more important: the cold start efficiency of the 0W-40 or the high temperature protection of the 15W-50? Thanks in advance.
[ June 22, 2003, 09:56 PM: Message edited by: reed ]