Related Clues:

• Request for rescue
• Havoline competitor
• NASCAR advertiser
• Indy sponsor
• Inits. at a gas station
• Engine-cleaning brand
• 500 letters?
• Emergency message
• Poseidon's call
• Mayday cousin
• CQD successor
• Terse radio message
• '___ yer old man!'
• 'Mayday!'
• Racer's sponsor