Diesel Vehicles
As you probably already know, diesel engines get better fuel economy than gas, simply because they don't need to burn as much fuel as gasoline engines to get the same amount of power. Diesel engines are built heavier than gas engines, to help sustain the added stress of the much higher compression ratios. Diesel engines don't have an ignition system either, so you'll never have to tune them up. The exhaust systems will last longer as well, as the exhaust on a diesel isn't as corrosive as an exhaust on a gasoline engine. With diesel engines, it isn't unusual to see them with 400,000 or even 500,000 miles. There are some out there that have even went beyond 600,000 miles! When it comes to maintenance, 3,000 mile oil changes are a must. Diesel fuel isn't as refined as gas, so the oil will get dirtier faster. You should also replace the air and fuel filters at least once a year.
If you live in a colder climate, you'll need to switch to a winter blend of fuel to prevent fuel gelling. There are several additives that you can put in the fuel as well, to help prevent your fuel from getting gel. It's also recommended that you replace the glow plugs every two years. If the temperature drops below 10 degrees, a block heater is something you should have. This will ensure starting in cold weather, especially with the heavy grade of oil that a diesel engine requires. If you take care of your diesel vehicle, you can count on it to be around for years to come. Unlike gas vehicles, diesel engines are built for the long haul, and will last you for miles and miles if you take care of them.
Yes diesel vehicles will last a lot longer in terms of milage and hauling than the average gasoline engine. Maintance of the diesel is a must. If you use it as a work vehicle you can go about 5,000 max between oil changes. If you go beyond this you could damage the engine. Having a block heater is a must if you live anywhere north of I 70 as your fuel will gel and your oil will be like molasses. There is nothing more fusterating than trying to start a cold diesel engine. Any simple block heater will prevent that from happening. A lot of diesel engines come with the block heater preinstalled.