Mitsubishi Mitsubishi Lancer 2007-2017 Fuel System Specifications

The 2007-2017 Mitsubishi Lancer is compatible with regular unleaded gasoline with an octane rating of 87 or higher. For models with the GTS trim or turbocharged engines, premium unleaded gasoline with an octane rating of 91 or higher is recommended for optimal performance. Always refer to the owner’s manual for specific fuel requirements and avoid using fuels with ethanol content exceeding 10% to prevent engine damage.

The Mitsubishi Lancer’s fuel system requires regular maintenance to ensure optimal performance. Replace the fuel filter every 30,000 to 40,000 miles and inspect fuel lines for leaks or wear. Use fuel system cleaner additives every 15,000 miles to remove deposits. Regularly check the fuel cap for proper sealing and replace it if damaged. Adhere to the manufacturer’s recommended service intervals for fuel injector cleaning and throttle body maintenance.

To replace the fuel filter on a Mitsubishi Lancer, first, locate the filter, typically found along the fuel line under the vehicle. Relieve fuel system pressure by removing the fuel pump fuse and running the engine until it stalls. Disconnect the negative battery terminal. Use a wrench to loosen the fuel line fittings and remove the old filter. Install the new filter, ensuring the flow direction arrow points toward the engine. Reconnect the fuel lines and battery, then start the engine to check for leaks.

If your Mitsubishi Lancer has poor fuel efficiency, start by checking tire pressure and ensuring proper alignment. Inspect the air filter and replace it if clogged. Clean or replace fuel injectors and check for faulty oxygen sensors. Use high-quality fuel and avoid excessive idling. If issues persist, perform a diagnostic scan to identify potential engine or transmission problems affecting fuel economy.

To optimize fuel performance, maintain a consistent driving speed and avoid rapid acceleration or braking. Use the manufacturer-recommended fuel grade and keep the engine well-tuned. Regularly replace spark plugs, air filters, and fuel filters. Ensure tires are properly inflated and aligned. Reduce vehicle weight by removing unnecessary cargo. Use cruise control on highways and avoid idling for extended periods.