In order for your vehicle to run, it needs an exact mixture of fuel and air. The air for this mixture first goes through the quality Napa Air Filter to protect your engine from dirt and other particles that could harm it. Fuel Filters need to changed approximately every 12,000 miles with quality Napa Fuel Filters. An extremely restricted fuel filter can cause fuel pumps to be over worked and future failure of the fuel pump. Quality Napa Oil Filters will keep your engine oil clean and extend the life of your engine when changing your Oil and Filter at the specified change intervals.