'98 XLT 4.0sohc, 3.73, 275/70 R16 Michelin Latitude Cross, rebuilt trans, shiftkit, AC on, LPG or 95 gas the same, 12MPG in Budapest city (lot of hill, traffic jams), and 21MPG on the highway appx.110km/h - 68mph only in 2WD (brown wire mod). When I push it on the highway between 130-150km/h...