Why has it bee so hard to find accurate gas mileage on the new 6.2L? FORD STATES NOTHING..All other forums the mileage is all over the place for those people that have responded. My lease is ready to end and I dont know if I want a 10 mpg guzzler. Currently have an 08 6.4 Diesel and I just dont want to spend 7800.00 on the 6.7 L