On: Bottled Water

[nostromo]

20 gallons of gas per barrel of oil http://www.eia.doe.gov/ask/gasoline_faqs.asp#gallons_per_bar...

11,400 average distance in miles driven per year in the US (in 1994 anyway) http://www.eia.doe.gov/emeu/rtecs/chapter3.html

11,400 miles / (17 barrels or 340 gallons) = 33.5 mpg

You can reasonably expect to get better than that in a hybrid. http://www.fueleconomy.gov/feg/hybrid_sbs.shtml