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:

    Government end users
    If the DATABASE is for a region of North America and is being acquired by or on behalf of the United States government or any other entity seeking or applying rights similar to those customarily c ...

    ON
    This is the normal operating position after the engine is started. ...

    Storage compartment
    These compartments can be used to store small items required by the driver or passengers. NOTICE • To avoid possible theft, do not leave valuables in the storage compartment. • Always keep ...