I have recently purchased some diesel from a well known supermarket which I believe was contaminated and has caused all sorts of problems with my car. The supermarket in question deny that their fuel can have been contaminated and have washed their hands of the matter. I have been trying to find a company which will analyse the fuel to see if it contaminated but so far have been unable to find one which will do this service as a reasonable rate. Does anyone know of any such companies or have any suggestions. Thanks CNR