Related Clues:
- Humble Oil brand
- 'Happy Motoring' sloganeer
- Italian pronoun
- Oil name from long ago
- Gas of the past
- Sinclair alternative
- Sinclair contemporary
- 'Happy Motoring' company
- Station name
- Big gas brand
- Flying A competitor
- Big name in petrol
- Company with the old mascot Little Oil Drop
- Conoco competitor
- Old 'Happy motoring!' sloganeer