I drive 104 miles every day round trip, half highway and have back roads and usually average about 415 miles to a tank of gas. Usually cruise above 75 on the highway.

 

something is VERY wrong with the Vibe/Matrix... had one for 6 years, brother drove it for 3 of them and city driving we both got around 27mpg, was probably 33-37 on the highway... We had the Toyota version, so I'm assuming she's got the Vibe and GM found a way to screw up the engine.

 

Most I ever got was a little over 330..