Does anyone know how to fix the calibration if it's way off? I get 1200 miles to empty on a full tank of gas and have never seen less than 600+ miles to empty even on a 1/4 tank of gas. The mileage indicator seems accurate as does the fuel gauge, but the miles to empty is so far off it's not even funny. My old 5ktq was _very_ accurate in this regard. Taka