Jiffy Lube International, a wholly owned, indirect subsidiary of Shell Oil Company, is one of the largest franchised, company-operated service centers in North America. Established in 1979, it offers a variety of maintenance and replacement services for automobile components, including air conditioners, cooling systems, air filters, radiators, drivetrain, starter motors, engine, transmission and windshield. The company additionally provides inspection services for batteries, wiper blades, power steering, serpentine belts and electric systems. It also offers terminal cleaning, vacuum testing, tire pressure checking and repair services. The company provides fleet services to Voyager, LeasePlan, GE Commercial Finance and Emkay. It operates more than 2,000 service centers throughout the United States and serves over 20 million customers annually. Headquartered in Houston, Jiffy Lube International maintains one of its locations in Portland, Ore.