If you fly at 4/5K you will hve to manage/close your oil rad to prevent excessive cooling and warm up your oil.
It seems to be alrdy modeled in the game
~S
PS: What I am concerned more is the Fuel consumption that seems pretty low for the 109. I had seen myself taking off from France for a free hunting online miss over sth london area ans still got back to base with 50% fuel remaining in my tanks ??!! And Don't tell me that those are fuel fumes
