fuel line vs petrol line

fuel line and petrol line both are nouns.

Word	Noun	Adjective	Verb	Adverb
fuel line	Yes	No	No	No
petrol line	Yes	No	No	No

As nouns, fuel line and petrol line are synonyms defined as:

fuel line and petrol line: a pipe that carries gasoline from a tank to a gasoline engine

Other synonyms of fuel line include gas line.

fuel line (noun)	petrol line (noun)
a pipe that carries gasoline from a tank to a gasoline engine	a pipe that carries gasoline from a tank to a gasoline engine