Diesel fuel additives are chosen based on the vehicle performance enhancement that the driver desires. Common types of diesel fuel additives include ones that improve fuel stability, fuel handling or engine performance or that decrease fuel contaminants. Almost all diesel fuel additives improve fuel mileage and engine performance.
Diesel fuel additives can be combined to treat more than one issue. When choosing which fuel additives to combine, make sure that they are compatible with each other and from the same manufacturer. If the two work against each other in the diesel fuel system, it could make the issues worse or cause damage to the engine.