Hello.. I've experienced a huge oil leak thru the vent in my PA-20 (engine: O-290 D2) lately and still don't know the reason and the mechanics i've talked to have all of them different reasonable opinions, but none of them are revealing. Is also important to notice that i dont trust very much on my temperature indicator, it marks 140F once it gets hot and it doesnt move from there at any time during flight, so it may be wrong data (I should check that too, i know) During Flight I notice that ...