Lincoln Lincoln MKZ 2007-2012 Fuel System Specifications

The 2007-2012 Lincoln MKZ is designed to run on regular unleaded gasoline with an octane rating of 87 or higher. Using premium fuel (91 octane or higher) is optional and may provide slight performance improvements. Avoid using diesel, E85, or any fuel with more than 10% ethanol, as it may damage the engine or fuel system components.

The fuel system in the 2007-2012 Lincoln MKZ requires regular maintenance, including replacing the fuel filter every 30,000 miles and inspecting the fuel injectors for clogs or leaks. Use fuel system cleaners every 15,000 miles to prevent carbon buildup. Always check for fuel leaks and ensure the fuel cap is tightly sealed to maintain proper pressure.

To replace the fuel filter, first relieve fuel system pressure by removing the fuel pump fuse and running the engine until it stalls. Locate the fuel filter under the vehicle near the fuel tank. Disconnect the fuel lines using a line disconnect tool, remove the old filter, and install the new one. Reconnect the fuel lines, reinstall the fuse, and start the engine to check for leaks.

If your Lincoln MKZ experiences poor fuel economy or performance, check for clogged fuel injectors, a dirty air filter, or a malfunctioning oxygen sensor. Inspect the fuel pressure regulator and ensure the fuel pump is functioning correctly. Use a diagnostic tool to check for error codes and address any issues with the engine management system.

To optimize fuel efficiency, maintain proper tire pressure, use high-quality fuel, and avoid aggressive driving. Regularly replace air filters and spark plugs, and ensure the engine is properly tuned. Use cruise control on highways to maintain consistent speeds and reduce fuel consumption. Keeping the vehicle lightweight by removing unnecessary items can also improve mileage.