Your mpg will suffer a good amount if you only drive that far.

One winter I did a lot of 2-3 mile total trips, and got only 22.5 on that tank. Eek!

Or, as other said, take the long way to work...I always do! I love to drive my car.

__________________
Dan
2005 E320 CDI - 246k
1987 300SDL TD05-16g, Herlevi pump, Elbe manifold, 2.47 LSD - 213k
Past: 1987 300D - 264k