Related Clues:
- Exxon abroad
- Onetime distributor of free maps
- Big name in petroleum, once
- Saskatchewan station name
- Exxon's ex-name
- Oil giant of yore
- Sunoco rival
- Sponsor of early radio's 'Five Star Theater'
- Brand name that sounds like two letters of the alphabet
- Mobil relative
- Rival of Phillips 66
- BP merger mate
- Brand name that's coincidentally Italian for 'it'
- 'Happy Motoring' brand
- Standard Oil, once