the top 10 most fuel-efficient cars of the past 25 years: per EPA's fueleconomy.gov 1. 2000 Honda Insight: 49/61/53 mpg city/highway/combined 2. 2010 Toyota Prius: 51/48/50 mpg city/highway/combined 3. 1986 Chevy Sprint: 44/53/48 mpg city/highway/combined 4. 1990-1994 Geo Metro: 43/52/47 mpg city/highway/combined 5. 1986-1987 Honda Civic CR-X: 42/51/46 mpg city/highway/combined 6. 1994-1995 Honda Civic HB: 39/50/43 mpg city/highway/combined 7. 2006-2010 Honda Civic hybrid: 40/45/42 mpg city/highway/combined 8. 1985 Pontiac Firefly: 39/47/42 mpg city/highway/combined 9. 1985 Suzuki SA310: 39/47/42 mpg city/highway/combined 10. 2010 Honda Insight: 40/43/41 mpg city/highway/combined http://content.usatoday.com/communities/driveon/post/2010/06/highest-gas-mileage-list-shows-todays-cars-cant-match-old-ones/1?csp=34money&utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+UsatodaycomMoney-TopStories+%28Money+-+Top+Stories%29&utm_content=My+Yahoo stockcharts.com/c-sc/sc?s=TM&p=D&yr=0&mn=8&dy=0&i=p88714027110&r=6922 stockcharts.com/c-sc/sc?s=HMC&p=D&yr=0&mn=8&dy=0&i=p88714027110&r=6922