gas gauge vs gasoline gauge

gas gauge and gasoline gauge both are nouns.

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

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

gas gauge and gasoline 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, petrol gage, petrol gauge.

gas gauge (noun)	gasoline 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