Subaru Forester: Fuel octane rating - Fuel requirements - Fuel - Starting and operating - Subaru Forester Owner's ManualSubaru Forester: Fuel octane rating

This octane rating is the average of the Research Octane and Motor Octane numbers and is commonly referred to as the Anti Knock Index (AKI).

Using a gasoline with a lower octane rating can cause persistent and heavy knocking, which can damage the engine.

Do not be concerned if your vehicle sometimes knocks lightly when you drive up a hill or when you accelerate. Contact your SUBARU dealer if you use a fuel with the specified octane rating and your vehicle knocks heavily or persistently.

    Turbo models
    The engine is designed to operate using premium unleaded gasoline with an octane rating of 91 AKI (95 RON) or higher. If premium unleaded gasoline is not available, regular unleaded gasoline ...

    Unleaded gasoline
    The neck of the fuel filler pipe is designed to accept only an unleaded gasoline filler nozzle. Under no circumstances should leaded gasoline be used because it will damage the emission contro ...

    See also:

    Using panic alarm
    If you are near your vehicle and feel threatened, you may activate the alarm to call attention as follows: 1. Push the PANIC button 3 on the Intelligent Key for more than 1 second. 2. The th ...

    Outside air temperature
    The outside air temperature is displayed in 8F or 8C in the range of −58 to 1408F (−50 to 608C). The outside air temperature mode includes low temperature warning features. - When th ...

    Starting the vehicle
    1. After starting the engine, fully depress the foot brake pedal before moving the selector lever out of the P (Park) position. This CVT is designed so that the foot brake pedal must be depress ...