Possible Clues:

• Letters in a red oval
• Son of a Gun! Protectant maker
• Auto additives co. that hints at this puzzle's theme
• Logo on many a Richard Petty race car
• Lucas Oil competitor
• "Plush" rockers (Abbr.)
• Sponsor at some NHRA events
• Part of the Armored AutoGroup
• Longtime sponsor of racing's #43 car
• "Interstate Love Song" band, briefly