What corporation based in Superior, Wisconsin sponsored the 2010 AMA Pro Supersport Championship?
Amsoil Amsoil Inc. is an American corporation based in Superior, Wisconsin that primarily formulates and packages synthetic lubricants and filters. The company's advertising slogan is "The First in Synthetics". The company uses multi-level marketing for distribution.
Harroun The Harroun was an automobile manufactured in Wayne, Michigan by the Harroun Motor Sales Corporation from 1916 to 1920. The company bore the name of its founder, racing legend Ray Harroun, who in 1911 won the first Indianapolis 500 Sweepstakes.