General Motors has improved its fuel-saving credentials by adding a direct-injected 3.0 litre V6 and 2.4 litre inline four to its range of powerplants, both of which deliver more power, greater torque and better fuel economy than their port-injected predecessors.

The direct-injected four-banger will be fitted to the 2010 Chevrolet Equinox crossover and produces 134kW and [...]

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