Steve Hanson, senior vice president of marketing,
A successor is to be named this week, the company said. Mr. Hanson's departure was described as voluntary.
Shell acquired the motor oil brands last fall. Omnicom Group's TBWA/Chiat/Day, Playa del Rey, Calif., now handles Pennzoil creative. Tucker Hampel Stefanides & Partners, New York, handles Quaker creative. Interpublic's Initiative Media, New York, now handles media.