Can anyone comment about the seeming staining of the valve cover here. Is it normal residual buildup from acceptable emissions?Is it a signal of a leak somewhere? Were any given this coleration from the factory? Were others which appear bright just washed regularly? In all my searching for one to buy. Since i missed on a member's a few months ago,this is the one most appealing by virtue of the mileage, price and location . A southern car gives me a lot of comfort being from the northeast.One more question, I can't say i have any disposable income and i would be mortgeging my no mortgage condo to buy ,is there any manifest rule with this car where certain parts regularly fail and if so what should i be prepared to replace in the near future. Thanks ,an addict.