I am sure the MPG figures vary from driver to driver and driving habits. The comfort is questionable, I've driven a C6, a C6 Z06 and I've been lucky enough to ride in a C6 ZR1, none of those are particularly great daily drivers, each of the people that owned these cars also had luxury cars in their stable. For someone like me; to come from a luxury car like a BMW and replace for it a Z06 as a dd would be tough. It's a fantastic vehicle but I couldn't give up the DD qualities for the performance.
2jZ + RB26 + 4G63 + LS9 + N54 =