Gasoline is a transparent, volatile liquid.  It is made by blending up to ten different refined products and is used mainly to power motor vehicles.

The United States is the largest consumer of gasoline and accounts for about two fifths of the world’s gasoline consumption on an annual basis. Gasoline remains one of the fastest growing segments of oil demand, with forecasts expecting a global expansion to over 300,000 barrels per day in 2014. Much of this demand growth comes from emerging economies and their growing middle class.

Octane rating is the measure of a gasoline’s ability to resist knocking or pinging during combustion.

The higher the octane rating, the greater the fuel’s resistance to knocking or pinging. The knocking or pinging in your engine occurs when the air/fuel mixture detonates prematurely. To find out if your vehicle would benefit from a higher-octane gasoline, check your owner’s manual. Using a lower octane than recommended can result in engine knocking or pinging in some cars.

To find out what octane your engine needs, first check your owner’s manual.

The recommended level is usually octane 87. Some car models have high-compression engines, which are designed to utilize octane levels of 89, 91 or higher. Ordinarily, your vehicle won’t benefit from using an octane higher than your owner’s manual recommends. But if your engine knocks or pings at the recommended octane level, you may need a higher octane gasoline to prevent knocking.