Federal law requires that gasoline octane ratings are displayed on the fuel pumps.
The vehicle manufacturer recommends the use of premium unleaded gasoline with a minimum octane rating of 91 AKI (Anti-Knock Index). Using the correct fuel specification helps to maintain the vehicle's performance, fuel economy, and drivability.
If premium unleaded fuel is not available, use unleaded fuel with a lower octane rating, down to a minimum of 87 AKI. Using lower octane-rated fuel may reduce the engine's performance, increase fuel consumption and can cause an audible engine knock and other drivability problems.
Do not use fuels with an octane rating lower than 87 AKI, as severe engine damage may occur.
Consult a retailer/authorized repairer if a heavy persistent engine knock is detected, even if using fuel to the recommended octane rating. Urgently consult a retailer/authorized repairer if an engine knock is detected while holding a steady speed on level roads. Failure to do so is misuse of the vehicle, which is not covered by the vehicle's warranty.
An occasional light engine knock when accelerating or climbing hills is acceptable.
Do not use leaded fuels, fuel additives, or fuels with lead substitutes, e.g., manganese-based fuels. Doing so may adversely affect the vehicle's exhaust emissions control systems and the vehicle's warranty.