Southwestern Petroleum is justifiably proud of its reputation for unmatched support and service to its customers. For over 65 years, loyal customers have been relying on the experts at SWEPCO to help them optimize total lubrication related expense and profits by improving their overall lubrication program. Whether they own one truck or manage 2,000 ... run an auto repair shop, a huge mining operation or a city water treatment plant, they know they can rely on the personalized service they receive from the home office sales and technical staff and their local field service representative.