We bought a 2009 Mazda 6 in September 2013. It broke down recently, with complete engine failure. The cause is unknown, but the oil and filter are suspected and cost of repair is approx. £6000.

The garage we bought it from are not interested in helping and I know from the service report that they used a non-standard filter, but can't prove they used the wrong oil. A diesel engine which has done 43,000 miles should not need to be replaced. In addition, the fly wheel also is damaged. Do you think I should be able to get some sort of good will payment from Mazda or the sellers of the car?