The most common and most likely answer to this crossword clue is the 5 letter word ETHYL which also is the latest solution we found used in USA Today in 2012.
Antiknock fuel crossword clue answers
Here's a list of possible crossword answers ranked by the most likely to least likely.
| Answer | Likelyness | Letters | 
|---|---|---|
| ETHYL | 100 % | 5 | 
Words with a meaning similar to the clue: Antiknock fuel
These words may or may not be a possible solution to this crosswords clue.- ethyl
 - octane
 - octane number
 - triptane
 - petrol
 - bromine
 - octane rating
 - dope
 - ether
 - high-octane
 - abrasive
 - flammable
 
Crossword Answer definitions
ETHYL noun- The univalent hydrocarbon radical, C2H5, formally derived from ethane by the loss of a hydrogen atom.
 
More crossword clues leading to the same solutions
Here's a few more crossword clues - all leading to the identical solution