High __; Fuel With a High Performance Rating
Puzzle 3 of Puppy Love Pack
Question is: High __; Fuel With a High Performance Rating
and the answer is: OCTANE
Word Meaning:
OCTANE — (organic chemistry) Any of the eighteen isomeric aliphatic hydrocarbons (C₈H₁₈) found in petroleum, especially an iso-octane 2,2,4 trimethyl-pentane; they are used as fuels and solvents.
Definitions from Wiktionary.