The new 2012 Infiniti M Hybrid will go on sale firm's retailers on March 16, 2011, with a base price of $53,700, or $7,000 more than the regular M37 that's powered by a 330HP 3.7-liter V6, the company announced. Infiniti's first mass produced hybrid model pairs a 306HP 3.5-liter V6 engine to a 50 kW [68HP] electric motor for a combined net output of 360HP and an estimated fuel economy of 27 mpg City, 32 mpg Highway, and 29 mpg combined. Read more »