General Motors is working on a turbocharged V-6 that could see application in a wide range of vehicles, perhaps in place of a V-8 in the vein of Ford's EcoBoost V-6. The new 3.0-liter twin-turbo V-6 would be heavily based on the 3.0-liter and 3.6-liter naturally aspirated, direct-injection engines that are now quite ubiquitous in GM's U.S...





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