[PDF] 2015 Mazda6 Maintenance Schedule - mazdausa intervals. 6-4 Maintenance and Care Scheduled Maintenance Mazda6_8DQ8-EA-13L_Edition1 Page396 Mazda recommends that all maintenance services be performed at the recommended time or mileage/kilometer period to ensure long-term reliability. Fuel filter Replace every 60,000 km IGNITION SYSTEM Spark plugs Replace every 120,000 km CHASSIS How Often Should I Change My Fuel Filter? | Angie's List Filter types can vary depending on the vehicle. However, Kreitzer says prices for a new fuel filter typically costs between $100 and $150, which includes parts and labor. According to Auto Service Costs, the average cost for a mechanic to install a new fuel filter is between $53 and $165, while ordering the part itself can cost around $14 to $60.