Your local gas station probably offers you 3 levels of gasoline, like gold, silver and bronze. These typically have different levels of octane in them and you will generally get a little better mileage for the more expensive type. In addition to different octane levels there are many different additives that can be in a companies brand of gasoline and this differentiation can have a big impact on your vehicle. One type of additive is a detergent which generally cleans your engine. Without some level of detergents engine deposits form and this causes reduced fuel efficiency, acceleration and power as well as increasing emissions and rough idling. [URL]http://www.zone-car.com[/URL]
