petrol gage(n = noun.artifact) gas gage, gas gauge, gasoline gage, gasoline gauge, petrol gauge - gauge that indicates the amount of gasoline left in the gasoline tank of a vehicle;
is a kind of gage, gauge
is a part of fuel system

depth gage, gage, gas gage, gasoline gage, petrol, petrol bomb, petrol station, pressure gage, rain gage, strain gage, surface gage, vacuum gage, water gage, wedge gage, wind gage, wire gage