ok, gas price has just jumped to $2.97/gal in NYC... the mileage on this car is MUCH better than my old '99 Intrepid (avg 18 MPG)... but the last three fill ups average 31mpg... on the low side of the 30/40 mpg estimates... i am a bit heavy on the gas, but im looking to hear everyones expierences on getting the BEST Gas Mileage out of these cars... what would be the best highway speed to be driving (faster or slower)...