Riding high

Odometer: 18342.2
Tank Mileage: 686.1
Gallons Added: 16.419
Long-Term Average: 41.6
Short-Term Average: 41.6
Calculated Average: 41.7

Just a touch further than the last miles driven record. More exciting is a new tank mileage record. While I truncate the values in the summary, I do record them in a more detail personal log. My new record tank average is 41.79 mpg. This includes an Interstate trip to Dayton for the the weekend, running around base while there and my normal commute on either side.

There was one exceptional leg. I had to go into work early Monday morning after I drove home from Dayton. I averaged 54.7 mpg over 25 miles on the short route that minimizes Interstate travel. Having almost no other traffic and most traffic lights flashing yellow really helped.

The 3-tank and 5-tank averages were also records, but I don't have them handy at the moment.

New Miles Driven Record

Odometer: 17656.0
Tank Mileage: 685.1
Gallons Added: 16.524
Long-Term Average: 41.2
Short-Term Average: 41.2
Calculated Average: 41.4

I hit 0 Miles to "E" on my way home tonight. By the time I got to the station I planned to used, I had just over 685 miles on the tank. This is a bit better than the previous miles driven record of 680. Commensurate with this is the most gallons added. I hope I never find out the absolute usable capacity of the tank. Assuming that the tank will take 16 gallons when on "E" seems to be well supported. That 16 gallons easily gets me over 600 miles of range and frequently over 650. The initial estimate for the next tank was 700 Miles to "E" when I started the car after the fill.

This tank included driving in Chicago for the weekend and the trip home (over 200 Interstate miles), a round trip to Lansing (150 Interstate miles) and three days of my normal commute (120 Interstate and 30 City miles). One thing about my commute: I have a choice between the route that yields the best mileage and the route that uses the least gas. They are very close, but that is the split on the averages.

2010-08-11 1906 ETA: My 3-tank (41.09, first time over 41) and 5-tank (40.71, first time over 40) averages are also records.

Now Beating the EPA

Odometer: 16324.1
Tank Mileage: 680.0
Gallons Added: 16.293
Long-Term Average: 40.7
Short-Term Average: 40.7
Calculated Average: 41.7

With this tank, my life-time average (calculated as all miles driven divided by all gallon bought) exceeds the combined EPA estimated mileage. (41 city/36 hwy for 38.5 combined) My lifetime average is now 38.52.

This tank set several other records: miles driven (680), tank mpg (41.7), 3 tank trailing average mpg (40.67). I also had a commute into work with an average of 47.6 mpg over 25.5 miles including 20 miles of highway. Finally, the estimated "Miles to Empty" after the fill was 711 miles. This was the first time I've seen over 700 miles displayed.

[Posted 2010-07-30]

New bests

Odometer: 4672.3
Tank Mileage: 634.5
Gallons Added: 16.157
Long-Term Average: 39.4
Short-Term Average: 39.4
Calculated Average: 39.3

I miscalculated my route to the Green Grand Prix and ended up driving beyond "E". I now know that there is an audio warning at zero in addition to the already discovered warnings at 50, 25, and 10 "miles to E".

I set new records in miles driven on a tank, gallons added during a fill-up, and calculated MPG for the tank.

I reset the Short-Term Average as part of the Green Grand Prix Fuel Economy Run. More on this later, but I did get 46.6 mpg for best in my class (and there was at least one other car, a Camry Hybrid, in my class).