Quote Originally Posted by petrified.rabbit View Post
...ac does take up to 15-20 hp.. on a bigger engines its less of a drain.. keep in mind there are a lot of factor to fuel economy than just engine size, epa estimates, etc.
If what you're saying is true, that could be up to a 20% performance loss on this vehicle which would take 35 mpg down to 28 so that makes sense.