I know for a fact that you can get at 15 MPG in a HUMMER H2 as long as you:
1. Are the only person in the Vehicle
2. Have less that 1/2 tank of fuel
3. Drive to and from work downhill
4. Fold in your mirrors
5. Be in a vacuum
6. and last but not least: Install the Tornado
What say all the neigh sayers now?