Stating your location and a rough idea of gas prices help too.
According to fuelly, my 2009 328xi (18 MPG lifetime average) near Chicago costs me $0.146 per mile to drive.
My previous car, a 1997 Accord EX (22.5 MPG lifetime average) was $0.174 per mile to drive.
It's funny how when I had a more fuel efficient car, gas prices were higher (around $3-4 per gallon) and when now when I have a thirstier car, they were lower (around $2 per gallon)
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