I tried to convince my wife to let me put the money into the truck and get it tuned and do a few other things instead of buying the Cobalt, but she wasn't having it. HAHA! I tried really hard to tell her it would be less money down the road, but she didnt like the idea of spending $2K to get 20 mpgs and not getting close to 30 mpgs in a commuter car. In the long run, it is probably better to get the second car because as soon as you start adding horse power and torque to those trucks things can fail, and it aint cheap to fix big diesel motors.
newb - 2005 Cobalt, Base Model, 5 speed. 2.2 Ecotech