Petron Corporation is the largest oil refining and marketing company in the Philippines, supplying more than a third of the country's oil requirements. It operates a refinery in Limay, Bataan with a rated capacity of 180,000 barrels per day (29,000 m3/d). From the refinery, Petron moves its products mainly by sea to 32 depots and terminals throughout the country.

Esso is a trading name for ExxonMobil. Originally, the name was primarily used by its predecessor Standard Oil of New Jersey after the breakup of the original Standard Oil company in 1911. The company adopted the name "Esso", to which the other Standard Oil companies would later object.