Indy 500 letters
The crossword clue "Indy 500 letters" is answered by STP, a 3-letter entry. Used 11 times across 9 distinct years; most recently in 2020; first recorded in 1997. It appears in 6 publications in the xd corpus. Every figure on this page comes from the collection data itself, never from a guess.
The answer
STP
3 letters. See every clue for this answer on the STP answer page.
Used 11 times across 9 distinct years; most recently in 2020; first recorded in 1997. It appears in 6 publications in the xd corpus. Frequency and last-seen figures come from the xd crossword corpus only.
Other clues for STP
Every other clue in this collection answered by STP, most used first.
- "The Racer's Edge" - used 88 times, most recently in 2026
- Fuel additive brand - used 70 times, most recently in 2026
- NASCAR sponsor - used 68 times, most recently in 2026
- NASCAR advertiser - used 42 times, most recently in 2026
- Gas additive brand - used 28 times, most recently in 2026
- Longtime NASCAR sponsor - used 27 times, most recently in 2026
- Motor oil brand - used 23 times, most recently in 2026
- Indy 500 sponsor - used 21 times, most recently in 2025
- Engine additive - used 18 times, most recently in 2025
- Indy additive - used 15 times, most recently in 2020
- Octane Booster brand - used 15 times, most recently in 2025
- Oil-treatment letters - used 15 times, most recently in 2006
- Indy sponsor - used 14 times, most recently in 2025
- Indy 500 advertiser - used 11 times, most recently in 2026
- Motor oil additive - used 11 times, most recently in 2025
- Engine additive brand - used 10 times, most recently in 2026
- Indy letters - used 10 times, most recently in 2019
- Valvoline rival - used 10 times, most recently in 2026
- Additive sold at NAPA - used 8 times, most recently in 2023
- Car care brand - used 8 times, most recently in 2025
- Oil treatment brand - used 8 times, most recently in 2026
- 500 letters? - used 7 times, most recently in 2021
- Big name in fuel additives - used 7 times, most recently in 2025
- Letters at Indy - used 7 times, most recently in 2020
- Longtime Richard Petty sponsor - used 7 times, most recently in 2022
- NASCAR additive - used 7 times, most recently in 2022
- Oil additive - used 7 times, most recently in 2012
- Auto additive brand - used 6 times, most recently in 2025
- Big race sponsor - used 6 times, most recently in 2022
- Fuel additive - used 6 times, most recently in 2020
- Fuel additive letters - used 6 times, most recently in 2024
- Gas additive - used 6 times, most recently in 2007
- Gas additive letters - used 6 times, most recently in 2026
- Valvoline alternative - used 6 times, most recently in 2025
Related clues
Clues in this collection of the same answer length that share a word with this clue, or match its answer pattern when no word is shared. Most used first.
- Genetic letters - RNA, used 265 times
- Debtor's letters - IOU, used 249 times
- Explosive letters - TNT, used 225 times
- Letters before an alias - AKA, used 194 times
- Alias letters - AKA, used 146 times
- Battleship letters - USS, used 124 times
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