CITGO has more than 13,500 branded retail outlets in 47 states and sells more than 7 billion gallons of high quality CITGO branded gasolines every year. We know gasoline. That's why we can offer you some help in choosing the grade of gasoline that's right for your vehicle.

So which grade of CITGO gasoline is right for you?

• Your first reference should be your vehicle Owner's Manual. Each auto manufacturer provides the recommended minimum octane for normal operation of the vehicle.
• As a general rule of thumb, however, use the octane grade which prevents your engine from knocking or pinging (engine knock is caused by the pre-ignition of fuel as it's compressed in the cylinder, milliseconds before the normal spark plug firing).

CITGO provides three different octane grades of gasoline - complete with CITGO's proprietary high-performance detergent additive - to satisfy the needs of a wide range of vehicles and operating conditions.