[zman246]

My wife's 2.2 automatic grand am always gets 30mpg with about 75% highway driving. When I drive it it drops down to like 25. She drives like a grandma and I have a lead foot. Even if you're driving habits are worse than mine, it still sounds too low to account for that bad of mileage. I don't know how hard it is to change an intake but you could put the old intake back in and see if you're mileage stays the same. At least then you could rule that possibility out.

Of course before you do anything else you should calculate exactly what mpg you're getting, not just the miles per tank