Subaru Subaru Outback 2010-2014 Fuel System Specifications

The 2010-2014 Subaru Outback is designed to run on regular unleaded gasoline with an octane rating of 87 or higher. Using higher octane fuel is not required but may improve performance in certain conditions. Diesel or ethanol blends above 10% (E10) are not recommended as they can damage the engine and fuel system components.

Subaru recommends inspecting the fuel system every 30,000 miles, including checking fuel lines, filters, and injectors. Replace the fuel filter every 60,000 miles or as specified in the owner’s manual. Regularly use fuel system cleaners to prevent carbon buildup and ensure optimal performance. Always follow the maintenance schedule outlined in your vehicle’s manual.

To replace the fuel filter, first, relieve fuel system pressure by disconnecting the fuel pump fuse and running the engine until it stalls. Locate the fuel filter, typically near the fuel tank. Disconnect the fuel lines and remove the old filter. Install the new filter, ensuring proper orientation, and reconnect the fuel lines. Restore fuel system pressure and check for leaks.

Poor fuel efficiency can result from clogged fuel injectors, a dirty air filter, or improper tire pressure. Check and replace the air filter if necessary, ensure tires are inflated to the recommended PSI, and use a fuel injector cleaner. If issues persist, inspect the oxygen sensors, spark plugs, and fuel system for potential problems.

To optimize fuel performance, maintain proper tire pressure, use high-quality fuel, and avoid excessive idling. Regularly replace air filters and spark plugs, and ensure the fuel system is clean. Driving at consistent speeds and avoiding rapid acceleration can also improve fuel efficiency. Consider using Subaru-approved fuel additives for additional performance benefits.