The term 'Pump Measure' refers to the measurement of fuel used in a vehicle. The two crossword solutions for this term are 'Octane' and 'Gallon'. Octane is a measure of the performance of a fuel, usually expressed as a number between 0 and 100. A higher octane rating indicates a fuel that is more resistant to knocking or pinging during combustion. Gallon is a unit of volume used to measure liquids, including fuel. One gallon is equal to 3.785 liters.