When it comes to buying a new or used vehicle, you’ve got options. Car, truck or SUV? All-wheel drive or front-wheel drive? Sedan or coup? Black, blue, silver or some other wonderful color? And that’s before you even take a look under the hood. If you’re in the market for a truck, you might be wondering about the differences between diesel and gas engines. While both types of engines will get you from Point A to Point B, there are some differences you should be aware of before you buy: Fuel efficiency Most people who search for a diesel truck for sale do so at least in part because of the improved fuel efficiency delivered by the diesel engine.  In