Company Overview. 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 and is looking to expand in 2021 by opening 30 new locations. Grease Monkey® International, LLC is the nation’s largest independent franchi...