Petrox

Petrox was a detergent additive used from 1954 to 1989 by Texaco, in its premium-grade "Sky Chief" gasoline. A new plant in Port Arthur, Texas was built to manufacture Petrox. Petrox continued to be used in Texaco's highest-octane gasoline for more than 30 years even after its leaded "Sky Chief" grade was replaced in 1981 by "Super Lead-free Sky Chief", which was renamed "Texaco Super Unleaded" in 1982.