Liquid Fuel Used in Non-Petrol Vehicle Engines
Puzzle 3 of Famous Streets Easy Pack
Question is: Liquid Fuel Used in Non-Petrol Vehicle Engines
and the answer is: DIESEL
Word Meaning:
DIESEL — A fuel derived from petroleum (or other oils) but heavier than gasoline/petrol. Used to power diesel engines which burn this fuel using the heat produced when air is compressed.
Definitions from Wiktionary.