new car payment. What I'm asking is, if one has a vehicle that's paid for, and is costing very little to maintain, but equals about $50/tank fill-up, averaging $200/month; is it worth trading that particular vehicle for say a new Toyota Corolla = $15k just for better gas mileage?? I'm helping a friend decide this very situation, my logic tells me that the truck's monthly gas bill is about equal of a new car payment, probably less actually, and he's only paying $75/month for insurance for that same truck. Whereas if he gets a new car, insurance and the payment could equal more then his monthly gas bill. FWIW - he does use the truck for what it's designed for at least 75% of the time. Would like your guys opinion on what you would do? As I personally don't see any logic to it - if he was still making payments on the truck I could clearly see trading it for a cheaper vehicle; as his monthly gas bill and payment together would definitely justify trading it.