For the past week the temps have hit low teens and below. Well my car has been getting horrrible gas milage since then. I don't know if this is normal but i wouldnt assume so. I was in iraq last winter so i cant remember how it drove 2 years ago. Also i dont know if my mods (65mm TB, true CAI, and full 2.25 ehaust headers back) have anything to do with it or not. At first i thought maybe because it was wet and cold the air filter just froze over a bit causing less air flow, but now its just cold and not wet. I got 200 miles to my last tank. and so far i have gotten 45 miles to a quater tank. I'm used to getting 75 plus to a quater tank. Any suggestions?