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:

    Modification/alterations to the electrical or fuel systems
    MITSUBISHI MOTORS CORPORATION has always manufactured safe, high quality vehicles. In order to maintain this safety and quality, it is important that any accessory that is to be fitted, or any mod ...

    Fuel Recommendation
    Your vehicle requires regular unleaded gasoline with a minimum rating of 87 pump octane ((R + M)/2 method). In some areas, the only fuels that are available are oxygenated fuels. Oxygenated fu ...

    Parking on a hill
    • If the vehicle is pointing uphill, turn the front wheels so that they point away from the curb. • If the vehicle is pointing downhill, turn the front wheels so that they point toward the ...