749.8 miles / 17.894 gal = 41.90 MPG.
I drove around town for 4 days, 256 miles on 10 gallons, for an avg of 25.6 MPG
Returning from Mesa, Arizona to Sacramento California via I-10 to I-5 in LA then north merging onto HWY 99 to Sacramento this journey included mild to heavy wind, rain and some brief snow over the Tejon pass outside of LA. When I arrived in Sacramento the dashboard computer reported an avg 45.1 MPG and avg. speed 52 MPH. Elapsed Time was 14:46 to drive 773.8 miles. I refueled in Newhall, CA with 10.245 gal and topped off in Sacramento with 7.926 gal for a total of 18.171 gal.
773.7 miles / 18.171 gal = 42.57 MPG.
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Fuel receipts add up to 36.06 gallons for the round trip of 1,523 miles = 42.23 MPG. Based on the EPA estimate for this car of 35 MPG I would have used 43.51 gallons so I used 7.7 gal less fuel, a 22% improvement over the EPA estimate.
35.8 x 125,000 = 4,475,000 btu / 1523 = 2,938 btu per mile
43.5 x 125,000 = 5,438,750 btu / 1523 = 3,571 btu per mile
Difference = 22%, 7.7 gallons, 633 btu per mile
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Data sources:
RWVER Dec 10 - 15, 2008 by Tim Castleman
http://www.toyota.com/corolla/specs.html
http://www.fueleconomy.gov
http://en.wikipedia.org/wiki/Fuel_efficiency
