I took a trip "down the shore" as Jersey people insist on calling it. I filled up and reset before leaving. I drove 15 miles on lighted town roads and highway, 25 on 50-60mph roads, got pulled over, hit the parkway for 100 miles, then drove 5 miles to my destination. I parked it with 20.5 mpg for the trip.
I also hit the speed governor 3-4 times

it was 1am so I had several spots with no other cars visible. Not bad fuel economy.
Staying in town, I get 13. When I did the trip without speeding nearly as much, I parked at 24. Commuting to work 17 miles of town, a little parkway, and traffic light highway, I get 18.
After changing intakes, everything dropped 2-3mpg because now I have a loud pedal and its just too much fun after commuting most days in an old Taurus.
That creaky console drives me crazy, too. The solution is to drive hard enough you need two hands on the wheel and don't lean on the console