Sorry we are closed to at least May 15th. Founded in 1978 and headquartered in Denver, Colorado, the Grease Monkey® brand currently operates more than 300 centers internationally with operations in Mexico, China, Colombia and Saudi Arabia. Grease Monkey® is the nation’s largest independent franchisor of automotive oil change centers with 18+ new locations opening in 2019. Grease Monkey® International is the nation’s largest independent franchisor of automotive oil change centers serving more than 2 million customers each year.