Fuel octane rating
Subaru Legacy / Subaru Legacy Owners Manual / Starting and operating / Fuel / Fuel requirements / 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:
Non-turbo models
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AM selection
Press the “AM” button when the radio is on to select AM reception. ...
Engine
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