In 1954, Mobil introduced a new and improved Mobilgas Special in response to trends toward new automobiles powered by high-compression engines that demanded higher and higher octane gasolines. The newest formulas of Mobilgas Special were advertised as offering "A Tune-Up in Every Tankful" due to a combination of chemicals known as the "Mobil Power Compound" which was designed to increase power, check pre-ignition ping, correct spark plug misfiring, control stalling and combat gumming up of carburetors. Later Mobil campaigns advertised Mobilgas as the "New Car Gasoline" following extensive testing during the annual Mobilgas Economy Run.