Mechanix
Mustaine formed Megadeth and released the song with its original lyrics a year later on Megadeth's debut album, Killing Is My Business... And Business Is Good!. When it was released, Mustaine retitled it to just "Mechanix". The original lyrics are about a gas station attendant who is sexually attracted to one of his customers, and uses several different automotive phrases and terms as sexual innuendos. This is the way the song was originally written (as can be heard on the early Metallica demo, No Life 'Til Leather), but has a much faster tempo than the original Metallica incarnation of "The Mechanix", being at approximately 247 beats per minute.
Later, after forming Megadeth, Mustaine would sometimes perform the song in concert, differentiating between "their (Metallica's) way" (referring to "The Four Horsemen") and "our way" on the Rude Awakening CD and DVD: "There are two ways you can hear this next song. There's our way and there's their way. For those of you who think this is their way, the song is called The Mechanix." In some concerts in 2009, Mustaine changed the line to "If there's one thing I want you to take with you tonight, it is that this song is not "The Four Horsemen", this is "The Mechanix".
In the original version of the song, Mustaine screams "Fuck yeah!" at 3:07; however, on the Greatest Hits: Back to the Start, this was cut out.
Megadeth has started incorporating the song into others such as "Holy Wars...The Punishment Due" and "Peace Sells". The band plays the song to a key section, changes and plays "The Mechanix" and then finishes the original song.
Read more about this topic: Mechanix