I know what the EPA tests the '10 GCSRT8 at 16 /12, but I want to know from real world drivers, what do you really average. I'm not looking for, "one time, down hill with a
tail wind, I got 20 MPG..." I want to know, tank over tank over tank of gas, what do you really expect for fuel economy? I'm not worried about the cost of the fuel, but just want to compare it to what I'm driving now and ...