Subaru Forester: Turbo models - Fuel requirements - Fuel - Starting and operating - Subaru Forester Owner's ManualSubaru Forester: 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 with an octane rating of 87 AKI (90 RON) or higher may be temporarily used. For optimum engine performance and driveability, it is required that you use premium grade unleaded gasoline.

NOTE
Be sure to use premium unleaded gasoline of 91 AKI (95 RON) or higher for turbo engine models. If other gasoline (lower than 91 AKI (95 RON)) is used, knocking, reduced output and poor accelerator response will result.

    Non-turbo models
    The engine is designed to operate using unleaded gasoline with an octane rating of 87 AKI (90 RON) or higher. ...

    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 ca ...

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    Functions
    NOTE If a warning message appears while you are using the trip computer, this message must be acknowledged in order to return to the trip computer function. Acknowledge a message by pressing ...

    Precautions against vehicle modification
    Always consult your SUBARU dealer if you want to install any accessory parts to your vehicle. Do not perform any of the following modifications. Such modifications can interfere with prop ...

    Operating
    Operating the power windows 1 Manual up/down 2 Auto up/down. All power windows can be operated using the control panel in the driver's door. The control panels in the other doors only operate ...