I figured I better fill up before the end of the month, unfortunatly it was $3 a gallon . I went 445.7 miles on 6.885 gallons = 64.73 mpg .
edit: I forgot the 42 day cycle, I guess I didn't need to fill up yet. When does the current cycle end?
Best tank= 81.23 mpg on july 1st 2008
SAVE SOME GAS, SAVE THE WORLD!