"Petrol" is a song by Northern Irish rock band Ash, released as the second single from their 1994 mini-album, Trailer, and as their first single on Infectious Records.

"Petrol" was first recorded on the "Garage Girl" demo tape and later appeared on Ash's debut live album, Live at the Wireless, and again on Ash's first greatest hits collection, "Intergalactic Sonic 7″s".

Tim Wheeler has expressed his dissatisfaction with this recording, and has even mentioned re-recording it as an acoustic B-side on a future album.

The second B-side, "A Message from Oscar Wilde and Patrick the Brewer", is a spoken-word track, lasting just 30 seconds and consisting of an excerpt of a tape Wheeler was sent of two of his Dutch friends, Oscar and Patrick, talking to each other.

This track also appears on the "Cosmic Debris" B-sides collection and on Ash's debut album, "Trailer".