The new model is powered by a petrol two-litre Skyactive-G unit (106kW or 121kW) in sedan or wagon bodies.
Fuel consumption is rated at 5.5 litres/100km for the sedan and 5.5 for the Tourer.
Mazda UK’s head of fleet, Steve Tomlinson, said: “Diesel models account for about 90% of upper-medium sector company car sales because many drivers are clocking up high annual distances.
“However, there is a section of the company car-driving population that requires an upper-medium sector car to meet work or lifestyle requirements but do not drive quite as many kilometres.
“Consequently, we believe that the all-new petrol Mazda6 offers the perfect choice as employees can enjoy the car’s top-notch performance whilst benefiting from savings."