Tank one hundred and eighty-three

Total miles: 62811. Trip miles: 341.0. Gallons: 6.122. Price per gallon: $3.339.

Screen mileage: 50.1 mpg. Tank mileage: 55.7 mpg.

Tank one hundred and eighty-two

Total miles: 62470. Trip miles: 386.2. Gallons: 9.235. Price per gallon: $3.419.

Screen mileage: 53.0 mpg. Tank mileage: 41.8 mpg.

Clearly the previous tank wasn't full, leading to poor tank mileage this time, and outlandishly good mileage last time. Averaging between the two trips, I get 55.3 tank mileage.

Tank one hundred and eighty-one

Total miles: 62084. Trip miles: 217.9. Gallons: 3.169. Price per gallon: $3.329.

Screen mileage: 53.5 mpg. Tank mileage: 68.8 mpg.

Looks like the tank didn't fill up.

Tank one hundred and eighty

Total miles: 61866. Trip miles: 297.8. Gallons: 6.171. Price per gallon: $3.379.

Screen mileage: 55.3 mpg. Tank mileage: 48.3 mpg.

Tank one hundred and seventy-nine

Total miles: 61568. Trip miles: 224.4. Gallons: 4.604. Price per gallon: $3.399.

Screen mileage: Unknown. Tank mileage: 48.7 mpg.

Colder weather, worse mileage. Maybe the tires were lower than normal, too.

Tank one hundred and seventy-eight

Total miles: 61344. Trip miles: 113.9. Gallons: 2.658. Price per gallon: $3.559.

Screen mileage: 44.3 mpg. Tank mileage: 42.9 mpg.

Some of the worst mileage ever, over a short distance. It snowed!