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. See your dealer or a qualified service technician if you use a fuel with the specified octane rating and your vehicle knocks heavily or persistently.

    See also:

    To decrease the speed (by the “RES/SET” switch)
    Press the “RES/SET” switch to the “SET” side and hold it until the vehicle reaches the desired speed. Then, release the switch. The vehicle speed at that moment will be memorized and treated as ...

    Using your Owner’s Manual
    Before you operate your vehicle, carefully read this manual. To protect yourself and extend the service life of your vehicle, follow the instructions in this manual. Failure to observe these in ...

    Safety & Reliability
    In crash tests from the Insurance Institute for Highway Safety, the Forester earned the top score, Good, in front and side impacts. The SUV was awarded an IIHS Top Safety Pick designation. Because ...