Unlike its competitors, such as RON, Globe Oil, and Terroil, Xero does not appear to have set up any gas stations in Liberty City, although it does operate a refinery at the southwestern corner of the Acter Industrial Park in Alderney. Xero storage tanks and faded advertising of the brand can also be found in selected parts of Liberty City, and Xero sponsorship vinyls are visible on certain Bati Customs designs.
Many Xero filling stations and their adjacent convenience stores can be found in San Andreas. ATM's and Jerry Cans are usually found at these gas stations. The company also owns a industrial building on Greenwich Parkway in the Los Santos International Airport, as well as a refinery in Blaine County.
It could be based on Exxon, as both have an "x" in their names and share the same colors in their logos. Its name and logo design also appear to be similar to that of Xoomer in Grand Theft Auto: San Andreas. It might also be based on Chevron, given the fact that much like Chevron, it has refineries on the East Coast, yet no presence in gas retailing there.
- 'XERO' is a pun of ZERO GAS, a mockery of the oil crisis.
- Based on the strong similiarities between their logos Xero may have Xoomer from GTA San Andreas. It is possible that the modern Xero is a rebranded Xoomer as the two chains share very strong similarities.