If you have a vehicle that has a diesel engine, you need to make sure that it has the best diesel oil filters. As the name suggests, these filters separate contaminants from the basic oil. Contaminants are a deadly enemy of a diesel engine, and they come in many forms. Even though no one would deliberately place a handful of sand in their engine, the truth of the matter is that you may be doing something very similar whenever you add or change lubricants, fill the fuel tank or simply start the car’s engine. It is for this reason that there is oil, air and fuel filter on every engine, and also why it is very important to make sure that you are using the right filter for your engine.