Ok, I installed on wed and drove around a couple of days. I just drove to my parents house for the weekend, 300 miles. On every other trip I usually get 24.8mpg, on this trip it went down to 23.1. How could this be with a new intake setup? By the way, my original filter was even dirty so I was expecting a huge difference. Has anyone had the same problem with mileage going down? By the way I had it cruise around 75 or so.