2002 Mazda 626 Owner's Manual - Page 70
2002 Mazda 626 Manual
Page 70 highlights
J94S.book Page 2 Saturday, June 23, 2001 1:04 PM Before Driving Your Mazda Fuel and Engine Exhaust Precautions Fuel Requirements Vehicles with catalytic converters must use ONLY UNLEADED FUEL, which will reduce exhaust emissions and keep spark plug fouling to a minimum. Fuel with a lower rating could cause the emission control system to lose effectiveness. It could also cause engine knocking and serious engine damage. Your Mazda will perform best with fuel listed in the table. Engine 2.5-liter engine 2.0-liter engine Fuel Premium unleaded fuel Regular unleaded fuel Octane Rating* (Anti-knock index) 91 [ (R+M)/2 method] or above (96 RON or above) 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. 2.5-liter engine You may use a regular unleaded fuel with Octane Rating from 87 to 90 (91 to 95 RON) but this will slightly reduce performance. CAUTION • USE ONLY UNLEADED FUEL. Leaded fuel is harmful to the catalytic converter. The lead will accumulate on the oxygen sensor and the catalyst inside the converter. This will result in a malfunction of the emission control system, causing poor performance. • 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. • 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. 4-2 Form No. 8Q50-EA-01G