Fuel System 57 Fuel Additives General Fuel additives are generally not recommended or needed for fuels listed earlier. Cetane improvers can be used as necessary. Biocides may be needed to eliminate microorganism growth in storage tanks. In cold conditions, treatment for water in the vehicle tanks may also be necessary. Consult your fuel supplier about the use of additives to prevent incompatibility among additives already in the fuel and the additives to be used. Supplemental Fuel Enhancers CAUTION Supplemental additives are not recommended because of a high risk of injection system problems or engine damage.
There are many aftermarket products available today which are intended to be added by the customer. They generally increase operating cost without providing benefits. Included are a variety of independently marketed products which claim to be: Cetane improvers Emission control additives Detergents Combustion improvers Smoke suppressants Cold weather flow improvers