Commercial trucks and buses that are constantly out on the open road are in service for lengthy amounts of time. Driving greater distances than the average commuter, the heavy duty vehicles are putting a lot of miles on their engine and breaking down the oil and other lubricants that are part of the drive train inside the engine housing. With a constant need to be out on the highways the large semi trucks and commercial buses count on the quality and dependability of aftermarket truck parts to keep them moving. Serviced by mechanics that are able to tear down an engine and rebuild it in matter of hours, the commercial vehicles are dependent on the shortest amount of downtime between runs for their servicing.
As drivers are sometimes required to be on the road for two solid weeks before seeing the lights of their home again the rigs and trailers are eating up thousands of miles of road each time the vehicles are put back out on the street. Requiring components that will keep pace with the long hauls that can take a driver and his truck from one side of the country to the other and back the mechanics that are replacing worn out alternators, starter motors and water pumps are able to find the best replacements for the engines that demand a high level of performance mile after mile.
With the tools to take apart the engine and put it back together quickly as they are installing aftermarket truck parts and accessories under the hood of the heavily driven commercial buses and semi tractors, mechanics that are specialized in working on the larger diesel engines are able to deliver the service that is keeping the vehicles going. Through any type of weather on every surface road imaginable the big rigs that are carrying all sorts of supplies and equipment across the country or delivering people across town are counting on their support teams of fleet mechanics to keep their trucks and buses on the road and running smoothly.