Every single vehicle I've ever owned I've had "good luck" with - meaning no major repairs or problems, by doing two things: changing the oil every 5,000 to 6,000 miles, and not running the piss out of them. I don't drive like an old man; but I do drive fairly gently. I accelerate easy, brake easy, and in general don't drive it like a race car.

I'm a clean car fanatic too; but that really has nothing to do with why my cars have lasted so long; it just makes them look nice. My 2000 Yukon has 188,000 miles, but appearance-wise it looks more like 40 or 50K miles.