I have this 10 mile section of highway that I usually reset my MPG in the computer and run to get an apples to apples comparison after mods (not that I have many) and I was getting nearly the same MPG reading I was before. Running for a week or so afterward I would say the MPG computer is on par with the old Duelers on my commute, also understand that most places just changed to winter gas so MPG (and the price) changes then as well compared to summer. I would say the tires may be slightly heavier due to the width but are exactly the same height so likely MPG is decreased slightly, I would say not noticeably.
Sorry did some in garage shots, I will do some outside and clean in the future.
Not past stock fenders
Full album: http://s1229.beta.photobucket.com/us...o%20ATM%20RF10