Im thinking about trading in my 02 Z28 for a 04-06 GTO. I have a long drive to work everyday and was wondering what type of gas mileage a stock GTO gets? Im averaging about 23 mpg and have seen up to 28mpg on the highway. I also do some drag racing on occasion (street and strip) was wondering how GTO's stack up against an 02 Z28. My best time at the track was a 12.98 at 109 with small bolt on intake exhaust catback smooth bellows. And one last thing I've driven a few cars with throttle by wire and there always seems to be a noticable delay. Is this common or noticable on a GTO? thanks for any info