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.

    See also:

    Repeating
    Repeating is operated in the same way a CD is played. Refer to “Repeating” F5-28. Each time you briefly press the “RPT/ RDM” button, the mode changes in the following sequence. ...

    2012 Subaru Impreza review
    The redesigned 2012 Subaru Impreza's most compelling attributes are evident before you even start the engine. Take a glance and you'll see more mature styling in both the sedan and four-door hatch ...

    Adverse safety consequences of under-inflation
    Driving at high speeds with excessively low tire pressures can cause the tires to flex severely and to rapidly become hot. A sharp in- crease in temperature could cause tread separation, and ...