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4-2 Before Driving Your Mazda Fuel and Engine Exhaust Precautions Vehicles with catalytic converters must use ONLY UNLEADED FUEL, which will reduce Fuel with a lower rating could cause the emission control system to lose effectiveness. It Your Mazda will perform best with fuel listed in the table. *U.S. federal law requires that octane ratings be posted on gasoline station pumps. Fuel Requirements Engine Fuel Octane Rating* (Anti-knock index) 2.5-liter engine Premium unleaded fuel 91 [ (R+M)/2 method] or above (96 RON or above) 2.0-liter engine Regular unleaded fuel 87 [ (R+M)/2 method] or above (91 RON or above) • USE ONLY UNLEADED FUEL. Leaded fuel is harmful to the catalytic converter. The lead will accumulate on the • Your vehicle can only use oxygenated fuels containing no more than 10% ethanol by volume. Damage to your vehicle may occur when ethanol exceeds this • Never add fuel system additives. Never add cleaning agents other than those specified by Mazda. Other cleaning agents and additives may damage the system. Consult an CAUTION |