I had my V6 reflashed to the currect ford specs. I can tell you that it does make more power for the car, like it unleashed power that was buried beneath some software. And yes, on the hwy my V6 will sit at 35 mpg all day at 65 mph. Toyota and Honda can claim any horsepower figure they want, but it has been documented that they always overinflate their claims. This has to be opposite with the Fusion V6 especially after it has been reprogrammed. It runs in line with the way my mother's Mark VIII runs and that ain't no slouch. It's the quickest car I've ever driven. It doesn't have the torque of a 90's Mustang GT, but it will run like one when you get it up into the revs and will probably leave one in roll-ons up to the rev-limited speed. The 6-speed, after reflashed, is truly awesome. It will hold every gear to redline in mine.