Headline at SFGate.com…2010 Fusion Hybrid is America’s most fuel-efficient midsize carDave Van SickleJust before Christmas, the all-new Ford Fusion Hybrid officially became America’s most fuel efficient midsize car with a certified 41 mpg city and 36 mpg highway rating. From Edmunds.com…If so, the EPA’s combined mpg for the 2010 Prius might exceed 50 mpg, a [...]