I did test drive and '01 F350 with the 7.3 and a complete Bully dog package, pipes - intake - programmer with and automatic. Truck mileage computer said 18 mpg and man this truck would flat out go.
And it's a Ford!
<insert evil grin here>
If you take the time it takes, it takes less time. --Pat Parelli
American by birth; Alaskan by choice. --ironbender