It all depends on what brand & model gas or diesel engines as with most things you can't give blanket answers as there are great engines in both & many to stay away from but in general diesels last way longer, get much better milage (I get 16-18 in the ambo & have a 1 ton Dodgw/Cummins I get 24 mpg) & have more power. They are usually louder on the outside of the vehicle but mine are not on the inside. I'll never buy a gas vehicle again. On any vehicle if you can get the service logs that's a plus & if you find one to buy pay a good mechanic to go over it in detail even if it cost $500 before you buy. I also have all the fluids, hoses, belts, etc checked and changed so I start with a baseline when I buy it. If you deside & find a diesel post what engine make, model & year & we can help help with that ones general history. Good luck!
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