Shanghai GM today introduced the first mainstream hybrid in China's upper-medium vehicle segment: the Buick LaCrosse Eco-Hybrid. The car is part of Shanghai GM's push to earn truly worthy green credentials -- the kind that surpass Chinese requirements and meet European standards.

The LaCrosse is the first car to get the two-mode hybrid system for the Chinese market. With it the, the new car gets 28 mpg as opposed to the non-hybrid's 24. From next year until 2012, GM will offer 11 more increasingly fuel-efficient engines, including the E-Flex drive and the Fuel Cell E-Flex. For this year, Chinese customers will get new powerplants in the form of the 1.2-liter S-TEC, an HFV6 3.6-liter dual mode DI V6, and a mystery two-mode hybrid that will better its gas-powered cousin by 50-percent in fuel economy with no drop in performance.

The LaCrosse Eco-Hybrid is the first hybrid in Buick's lineup, and will use a development of the Belt Alternator Starter hybrid system akin to the Malibu Hybrid. Unlike the Malibu Hybrid, though, we won't be seeing the LaCrosse Hybrid here in the States.