Comparing hybrid, plug-in and 19 mpg
RechargeIT.org: A Google.org Project has been running a long-term test on their fleet of Toyota Prius and Toyota Prius retrofitted as a plug-in hybrid, comparing expense, C02, pay-back, etc.
They provide a calculator to compare your own mileage.
The U.S. fleet of automobiles currently averages 19 mpg !







