So, one of the guys on my Fusion Sport forum just brought this to my attention that the mpg calculator can be adjusted. Take your manual calculated mpg and divide by the computer calculation. Example 21 mpg manual cal divided by computer cal 22.3 = 0.9417. You can round up to 0.942. Multiply by 1000 gives you 942. Plug that number into step #7. #1 Hold the left steering wheel center ok button down. #2 turn accessory power on (do not start). #3 you'll see ET appear (top of left screen, don't judge standard gauges so I don't know how or where that will appear). #4 hit ok. #5 Engineering screen will appear. #6 hit arrow up to the AFE screen and follow screen to adjust. #7 once set to desired numbers turn off ignition. It may take 1 or 2 tanks to fully adjust to the change. That should get you closer to real mileage. My Fusion at 26,000 miles was consistently around 1.3 mpg high on the computer. I'll monitor both once I drive and fill and compare manual to computer from now on.