All: I posted this earlier, and copied it here as more germaine.
Over Christmas, we visited Virginia Beach, VA, driving from there to Southern Maryland with wife, dogs, and full tanks of fuel but no water or sewage. Between Virginia Beach and the fuel stop just short of the VA-MD line on US 301 we used exactly 11 gallons of fuel, covering 165 miles--which I make to be 15 MPG, @ $2.79 per gal. Averaged about 50 mph--heavy traffic in places.
We stayed over an additional day while a fresh storm with 40 mph winds blew through--QED
91 350 LE
454
MSD ignition
Gearvendors
Headmans
Driving mostly by cruise control, mostly flatland.
Best to all,
Rob