I brought my 08 into the dealer about 2 months ago complaining for the 3rd time about hunting for gears at low speeds and rough idle on cold starts, this time they actually reflashed the PCM with a different tune/parameters which helped a little bit...... it does not get driven much and to be honest with the nicer weather and gas prices its been parked more than usual (been driving the Z06 here and there). I had to drive it more over the last couple of weeks bringing my wife and M.I.L. to the airport and picking them up as well as working on one of my properties hauling stuff around. I noticed that I had significantly more miles on my trip odo. and hadnt used as much fuel. Gassed it up the other day and checked my mileage and got just shy of 13mpgs. Got 50 miles on this tank and the needle hasnt even come off of full yet. Im guessing a combo of the warmer weather and the reflash have helped. Previously I was typically 11-11.5mpgs. I do drive it easy as there is no point in putting your foot into it, its a 6700lb. pig not a race car
