gas gauge vs petrol gauge

gas gauge and petrol gauge both are nouns.

Word	Noun	Adjective	Verb	Adverb
gas gauge	Yes	No	No	No
petrol gauge	Yes	No	No	No

As nouns, gas gauge and petrol gauge are synonyms defined as:

gas gauge and petrol gauge: gauge that indicates the amount of gasoline left in the gasoline tank of a vehicle

Other synonyms of gas gauge include gas gage, gasoline gage, gasoline gauge, petrol gage.

gas gauge (noun)	petrol gauge (noun)
gauge that indicates the amount of gasoline left in the gasoline tank of a vehicle	gauge that indicates the amount of gasoline left in the gasoline tank of a vehicle