Lyric discussion by zenderboy01 

Cover art for Fuel lyrics by Metallica

I think this song is about ones desires, and satisfying one's desires. It also shows Hetfield has a desire for things in life. Hetfield is using a metaphore, obviously , a car. Using first person shows he's talking about his desires. "I burn", "quench my thirst", and "my desire", is a dead give away. Overall this song kicks @$$.