Gasoline FAQ 
Answers to nearly every gasoline-related question which can be asked.
http://www.faqs.org/faqs/autos/gasoline-faq/part1/U.S. Department of Energy: Fuel Economy 
Find cars that protect the environment and save you money. Information on advanced technology, gas mileage tips, links, and car by car fuel ratings.
http://www.fueleconomy.gov/
Tips to Improve Gas Mileage 
Provides 12 fuel economy tips.
http://www.mpgplus.com/
HowStuffWorks: How Gasoline Prices Work 
Information on what drives the price at the pump, with pictures and related links.
http://www.howstuffworks.com/gas-price.htm
Columbia Plateau Clean Cities Coalition 
Provides definitionas descriptions and benefits of a variety of alternative fuels.
http://www.cpccities.org/altfuels.htm
Fuel Consumption Converter. 
International fuel consumption converter, kilometers per liter to miles per gallon.
http://www.euronet.nl/users/grantm/frans/fuel.html
Alternative Fuel Vehicle Fleet Buyer's Guide 
Site is designed to help consumers and fleet buyers understand and acquire AFVs.
http://www.eere.energy.gov/cleancities/vbg/fleets/
Alternative Fuels Data Center 
Provides information on alternative vehicle fuels and transportation technologies and related legislation. The center also distributes the newsletter "Biofuels News."
http://www.eere.energy.gov/afdc/
Uncle Mark's Alternative Fueling Station 
Alternative motor vehicle fuel FAQs, detailed background information on the subject, and reports on developments in the alternative-transportation marketplace.
http://www.altfuels.org/
Tony's Guide to Fuel Saving 
A professional engineer's skeptical view of many of the "miracle" fuel saving devices. Also includes gas economy measures and general car information.
http://www.fuelsaving.info/