I bought my 4WD 2006 EX-P Element last year with 97,000 miles on it and averaged 22-25mpg last winter-just as cold as this winter. The last two months average fuel consumption has been 17-19 mpg. The mechanic says it is "running rich" but cannot figure out why. I have searched and cannot find a reason for this. My driving habits have not changed, the fuel pressure is normal. Can anyone help?