With Expertise Built In™, the OTR Spin-On Fuel Filter protects fuel pumps and injectors against destruction from dirty contaminants, such as: water, fungus and bacteria, precipitates, particulates, and wax. Signs or symptoms of a bad fuel filter are hard start, rough idling, noises from fuel pump, truck stalling, and fuel system component failure. Changing fuel filters prevents clogs while maintaining fuel injectors. This simple step allows diesel fuel a clear, clean passage to the engine for more power and better fuel mileage. This heavy duty engine fuel filter replacement is quick and easy to install, providing your truck with the extra protection of OTR. FleetPride is your First Click in Heavy Duty®.