Related Clues:
- Predecessor of Exxon
- Humble Oil gasoline brand
- Bygone U.S. gas name
- Bygone gasoline brand
- 'Put a tiger in your tank' company
- Little Oil Drop was its mascot
- 'Happy Motoring!' sloganeer
- Old rival of 105-Across
- Arena where kings play
- A gas from the past
- Old Standard Oil brand
- Humble Oil brand
- 'Happy Motoring' sloganeer
- Italian pronoun
- Oil name from long ago