My research with Edna lead me to this.

"GAITHERSBURG, MD--(Marketwire - 08/27/10) - Chesapeake Petroleum, a distributor of nationally known brands of motor oils since 1961, whose principal office is in Gaithersburg, Maryland, announced today that it had acquired the business of Skyline Oil Co. Tony Santy, the CEO of Chesapeake, commented that, "With the acquisition of Skyline, we are adding three new brands of motor oil to our already ..."