What octane levels are available at Exxon stations?
A. Exxon offers three grades of unleaded gasoline at our service stations: 87 octane (Exxon Regular), 89 octane (Exxon Plus), and 93 octane (Exxon Supreme). In high altitude areas, such as the Rocky Mountains, the equivalent octane levels typically available are 85, 86 and 91. All three grades contain the same amount of our engine cleaning additive. Q. What octane level is right for my car? A. To find out what octane your engine needs, first check your owner’s manual. The recommended level is often unleaded regular (87 octane). Some models have high compression engines which are designed to utilize the octane level in Exxon Plus or Supreme. Ordinarily, your car will not benefit from using a higher octane than is recommended in the owner’s manual. But if your engine knocks or pings at the recommended octane level, you may need a higher octane gasoline to prevent the knock. Knocking may occur under certain conditions. A small percentage of cars may knock because of variations in engines
