As of the 2014 season, all F1 cars have been equipped with turbocharged 1.6-litre V6 engines. Turbochargers had previously been banned since 1989. This change may give an improvement of up to 29% fuel efficiency. One of the many reasons that Mercedes dominated the season early, was due to the placement of the turbocharger's compressor at one side of the engine, and the turbine at the other; both were then linked by a shaft travelling through the vee of the engine. The benefit is that air is not traveling through as much pipework, in turn reducing turbo lag and increases the efficiency of the car. In addition, it means that the air moving through the compressor is much cooler since it is farther away from the hot turbine section.