AMCo. is an oil company in Liberty City in Grand Theft Auto III, and Grand Theft Auto: Liberty City Stories. The company has offices in Trenton, Portland Island and Pike Creek, Shoreside Vale, with their headquarters located in Torrington, Staunton Island. An AMCo. filling station can also be found in Harwood. On the sign, you can see logos of businesses that you will find later in the game, such as Squid, Sumo, Gasoline, OK clothing, and more. It is a parody of Amoco and ARCO.
- During the development of GTA III, the AM sign at the gas station originally said AMCo.
- As seen in Liberty City Stories, the walls at the gas station were originally made of brick.