San Francisco Yellow Cab has purchased ten 2005 Ford Escape Hybrids in another move to clean up the transit systems. Luxor Cab Company of San Francisco also has a fleet of five Escape Hybrid Taxis, which were placed in service earlier this year. Taxi cab drivers are turning in their Crown Vics for greener Escapes. A San Fran taxi driver says his fuel economy has gone from 12 to 14 mpg in the Vic to between 31 and 36 mpg in the Escape. Well worth it to more than double economy and add a little more luggage room. To play devils advocate, what does the long-term maintenance cost look like on these?