So I purchased a 2004 525i that currently has 106k on it and the first full tank of fuel that i put in it went surprisingly fast. I was under 100 miles still when I passed that 3/4 of a tank mark. I recently sold my 2010 Nissan Titan LE V8 that got a HELL of a lot better gas mileage than that. Anybody have any suggestions? I purchased a diagnosis tool to diag my new baby. I won't be gettin it in the mail till probably the 22nd. So in the mean time, does anyone have any suggestions? Responses are greatly appreciated. Thanks!