Lexus IS Convertible (2010)

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    Items to initialize
    After reconnecting or performing maintenance on the battery, the following items must be initialized for normal system operation. ...

    Fuel information
    Your vehicle must use only unleaded gasoline. Premium unleaded gasoline with an octane rating of 91 (Research Octane Number 96) or higher required for optimum engine performance. If 91 octane canno ...