My vote goes to diesel pickups, particularly older ones. Definitely a vehicle where if you can't afford a new one, you can't afford an old one. But people love them, cling to them and pay thousands of dollars to repair them. They'll point out the milage and pulling power. Yup they are great but once they get old and start breaking down they get expensive. In the last several months I've watched a few people I know spend thousands on the things. Transmissions, leaky cylinder heads, fuel injection systems, emission systems and electrical systems. Seems like if a mechanic lifts the hood it's a thousand bucks or more. Granted the people I know with them all own ones over ten years old with high milage. Our fleet managers at work stopped buying diesel pickups before 2015 when I started with the state. Those guys and gals are strictly numbers people and there apparently isn't a numbers advantage with the things. Just the cost of maintaining them is staggering over the approximately 150k service life we keep a pickup. They take more oil at every change and fuel filters need changing often. A gas pickup uses less oil, the oil filter is way cheaper and the fuel filter normally lasts till the truck is sold off. I know there's some expensive cars to keep running but I've never seen people throw so much money into keeping a vehicle like I do with diesel pickups.