2010 Mazda CX-7 Owner's Manual - Page 144

CX-7_8AS7-EA-09E_Edition2 Page144 Friday, June 5 2009 2:25 PM Black plate (144,1) Before Driving Your Mazda Fuel and Engine Exhaust Precautions Fuel Requirements Vehicles with catalytic converters or oxygen sensors must use ONLY UNLEADED FUEL, which will reduce exhaust emissions and keep spark plug fouling to a minimum. Your Mazda will perform best with fuel listed in the table. 2.3-liter engine Fuel Premium unleaded fuel Octane Rating*(Anti-knock index) 91 [ (R M)/2 method] (96 RON) recommended * U.S. federal law requires that octane ratings be posted on gasoline station pumps. This vehicle is designed to use 91 [ (R M)/2 method] (96RON) or higher gasoline for best performance. If 91 [ (R M)/2 method] (96RON) is not available, 87[ (R M)/2 method] (91RON) gasoline can be used. Use of gasoline lower than 91 [ (R M)/2 method] (96RON) can decrease performance, deteriorate shift quality and cause engine knocking during its use. 2.5-liter engine Fuel Regular unleaded fuel Octane Rating*(Anti-knock index) 87 [ (R M)/2 method] or above (91 RON or above) * U.S. federal law requires that octane ratings be posted on gasoline station pumps. Fuel with a rating lower than 87 octane (91 RON) could cause the emission control system to lose effectiveness. It could also cause engine knocking and serious engine damage. CAUTION Ø USE ONLY UNLEADED FUEL. Leaded fuel is harmful to the catalytic converter and oxygen sensors and will lead to deterioration of the emission control system and or failures. Ø 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 recommendation, or if the gasoline contains any methanol. Stop using gasohol of any kind if your vehicle engine is performing poorly. Ø 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 Authorized Mazda Dealer. Gasoline blended with oxygenates such as alcohol or ether compounds are generally referred to as oxygenated fuels. The common gasoline blend that can be used with your vehicle is ethanol blended at no more than 10 %. Gasoline containing alcohol, such as ethanol or methanol, may be marketed under the name "Gasohol". 4-2 Form No.8AS7-EA-09E