In 1962, the gasoline product lines marketed as Mobilgas and Mobilgas Special were rebranded as Mobil Regular and Mobil Premium in a move to emphasize the shortened brand name "Mobil" in promotional efforts, although Mobiloil continued as a single-word term until the 1970s. After a few years of advertising Mobil gasolines as "Megatane"-rated and as "High Energy" gasolines, Mobil began, in 1966, to promote both its Regular and Premium fuels as "Detergent Gasolines", due to the inclusion of additives designed to clean carburetors and various internal engine parts. During the early 1970s, Mobil ran a TV commercial featuring a character known as "Mr. Dirt" to show the ruinous effects that dirt had on automotive engines for which a tank of Mobil Detergent Gasoline could provide a cure and preventive medicine against damage that could lead to costly repairs.