Oilspill is an Accord Dropship pilot for the player's ARES team. Despite the fact that he's supposed to be piloting one almost constantly, he can be found in Thump Dump in a small office. His real name is William, although he prefers Bill. He goes by Oilspill since that's what everyone calls him anymore. You get to know that he crushes on Aero in one of the audio files that are scattered around New Eden. He appears to have a laid-back personality and attitude.
You first encounter him in the instanced mission Crashdown, where you help him get out of his Dropship, the Faulkner, and repair it. He appears again later in many other instanced and ARES missions, providing transport and information.