Pilot Corporation opened its first truck stop in 1981. On November 15, 1993, Pilot entered a joint venture with Marathon Petroleum Company, and all Pilot Truck Stops were renamed Pilot Travel Centers. At its inception, the number of stops was around 60; however, that was to be short-lived.
In the next few years, Pilot Travel Centers experienced significant growth. Marathon converted many Speedway truck stops, wholly owned by Marathon, over to the Pilot Travel Center moniker starting in mid-2002. Midway through 2003, another major expansion occurred with the purchase of the Williams Truck Stop chain. The Marathon-Pilot joint venture successfully increased the Pilot Travel Center name recognition throughout the United States, as the number of stops more than quadrupled.
Currently, Pilot Flying J is the largest purveyor of over-the-road diesel fuel in the United States. Pilot Flying J also is known as the largest Travel Center chain in the country with over 750 locations under the Pilot, Flying J, & Mr. Fuel brands. Pilot Flying J is also the third largest franchiser of quick service restaurants in the nation, offering one to three different concepts at each location, making it the largest franchisee of Subway in the world with over 200 locations. Unlike many travel centers and truck stops, the majority of locations with the Pilot Travel Centers brand do not utilize full-service dining. However, the Flying J brand does utilize full-service dining with Denny's, as do a small handful of Pilot-branded locations.
According to wikipedia