Related Clues:
- Big oil company
- Sacramento's ___ Arena
- Big name in petroleum
- Shell alternative
- With a bow, to Stern
- Exxon, once
- 'The sign of extra service' sloganeer
- Canadian oil company
- Big name in the oil biz
- Old U.S. gas brand
- Acronym formed from 'Standard Oil'
- 'Giovanna d'___' (Verdi opera)
- Bygone sign on U.S. highways
- Old Phillips 66 rival
- Petrol station choice