I\'ve recently got a "new" car after writing our Blitzen off. I got another one, Lol. Anyway this new one goes incredibly well but it uses quite a lot more gas than the old one. Don\'t ask for exact numbers but I know it\'s using more. One thing I\'ve noticed is that at highway speeds the engine revs a little higher than the old car but only by about 200rpm so that doesn\'t really seem like the culprit? It uses no oil and the water level is rock steady, the brakes aren\'t binding at all, the tyres and whels are factory size too. Obviously dirty air filters, munted AFM and O2 sensors can cause issues but there\'s no codes showing up. I need to get it in to a mechanic for a scan but until then it\'d be good to at least know what might cause higher fuel use. I\'m going to guess it might be a sensor on the way out and it\'s just not throwing codes yet?