Race car additive

This crossword clue is for the definition: Race car additive.
it’s A 17 letters crossword puzzle definition.
Next time, when searching for online help with your puzzle, try using the search term “Race car additive crossword” or “Race car additive crossword clue”. The possible answerss for Race car additive are listed below.

Did you find what you needed?
We hope you did!.

Possible Answers: STP.

Last seen on: Daily Boston Globe Crossword Wednesday, February 8, 2023