Low fuel consumption and CO2 emissions make the Mazda 6 affordable to run as either a private or a company car. The popular 148bhp diesel engine is bursting with power and flexibility. UK Car Discount have discounts available across the Mazda range, for example a Mazda6 2.2 Diesel SE-L Nav 4-door saloon will cost you just £18,845.40, a saving of £4,749 off the normal list price.