All I did was put gas in it, then drive on the interstate at 70mph and then I drove around st louis, then I filled up the take, and that is when I took the picture. I have no idea how you pull off 30mpg in a GT
I'm lucky if I get over 260 miles (400kms) to a tank @ 50/50 mixed driving. I goose it here and there, skip shift 1/2 the time. I'm used to it due to owning V8s all my life, but it kills me when I hear GT's getting like 400 miles to a tank...............