I am wondering for those that have a 6.2 powered Superduty what is your MPG?
I ask you to also tell me what is your GVWR?
What is the Rear Axle Gear Ratio?

According to Ford if the GVWR is under 10,000 lbs the Horsepower is 385@5500RPM and Torque is 405@4500RPM.

While the GVWR'd vehicles over 10,000 lbs is Horsepower 316 @4179RPM and Torque 397@4179RPM.

I'm curious if there is a MPG difference between the different power ratings?