Diesel engines are built into commercial vehicles that transport goods from one end of the country to the other because they have more advantages to them than unleaded gasoline vehicles do. For one thing the engines in a diesel truck have fewer moving parts and can be driven for two to three more times that regular fueled trucks can go. Another advantage is that diesel engines are more powerful than gasoline and can haul, tow or pull much more weight than unleaded fuel engines can, which is why they are used in military vehicles as well as in commercial trucks. The transportation industry counts on dependable long haul trucks to take pickups and deliveries of raw materials and finished good anywhere in the country that they need to go. But because the big rigs are constantly on the road the owners of the transportation companies are constantly upgrading their fleet with new makes and models of trucks.

When one rig is brought in to replace a truck that has been in service for a number of years the company will offer their used commercial trucks for sale to smaller trucking companies and retailers that can drive the equipment locally once the highway vehicles are decommissioned. Refurbished and ready to go back out onto the streets used trucks still have plenty of life left on the engine and can be in service for many more miles to come. Because diesel engines are able to throw down about 400,000 miles before they need to be retired a driver that is looking for a dependable commercial trucks for sale can find one that has 100,000 miles on and know that the vehicle will continue to be driven for many years to come. Just like rental companies that buy fleets of cars and sell them off when they reach 20,000 miles in the first year the commercial used trucks are able to provide miles of faithful service to a buyer that is looking for a discount on the purchase of a newer vehicle.