Related Clues:

• Garage smudge
• Atar, for one
• Crude cargo
• Cartel commodity
• Alaska resource
• A splash in the pan
• Masseuse's supply
• Well output, perhaps
• Squeak quieter
• Alaska's main export
• Maintain, as some tools
• Engine additive
• See 24 Across
• OPEC stuff
• Slick liquid