The Energy Information Administration (EIA) say that the average price difference between premium and regular unleaded gasoline in the United States is approximately 30 cents per gallon. Drivers wanting to save money at the pumps will often choose to use regular fuel instead, but using a lower grade gasoline could cost you money.

Premium Required Vs Premium Recommended?

• Premium Required: If premium fuel is required by the manufacturer, the engine control computer of the vehicle has been programmed to protect the engine from damage of erratic combustion. Extreme driving conditions could result in engine problems and repairs may not be covered under warranty if the damage is found to be the result of using gasoline that does not meet the octane requirements specified in the owner’s manual.
• Premium Recommended: The engine is calibrated to perform best using premium grade gasoline, but the electronic engine management system incorporates a sensor to detect knocking, so it will run on lower octane fuel without harm. Some drivers may notice a drop in performance and fuel efficiency.

According to Edmunds.com, the higher pump price of premium fuel has affected lower priced vehicle sales. Not wanting to risk losing customers, automobile manufacturer’s usually only “recommend” the use of premium gasoline. “What we are seeing now is a higher penetration of smaller engines that are developing more power and torque,” Bill Visnic, a senior editor at Edmunds.com, said. “As you get to the more expensive higher output engines, manufacturers are probably going to at least recommend premium fuel, if not require it.”