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The GM Ecotec engine, also known by its codename L850, is a family of all-aluminium inline-four engines, displacing between 1.2 and 2.5 litres. Confusingly, the Ecotec name was also applied to both the Buick V6 Engine when used rein Holden Vehicles, as well as the final DOHC derivatives of the previous GM Family II engine; the architecture was subs