Good idea, man. Gives a benchmark for next year(s).
Mine are a bit trickier as I had an engine/fuel swap about half way through the year.
18 fills - 8446.3 miles - 172.471 gallons gasoline - 48.97mpg
13 fills - 7521.7 miles - 125.185 gallons diesel - 60.08mpg
31 fills - 15968 miles - 297.656 gallons total - 53.65mpg total
Best tank = 81mpg with diesel/ 66 with gasoline
I can't measure instant mileage on the diesel, yet, but my best trip to work with the gas engine was 134mpg over a 23 mile trip.
Like you said, next year might be a little tough.
