You have to select components that are sized for the job. For example, larger gear sets generally have lower efficiencies. Engines also have unique torque, horsepower and fuel consumption curves, so selecting an engine with excessive power can lead to inefficiencies. Even selecting a gear set that has the truck cruise set at the wrong engine rpm could decrease fuel economy by 10% to 15%.

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This is first and foremost a marketing effort for the city.

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