Firstly I would wager several large drinks that the likes of Morrisons, ASDA, Tesco et al are hearing the same story everday from chancers who made the mistake themselves and are trying to shift the blame. So for them to fire you off comes as no real surprise.

Perhaps if you can find several others who bought fuel on the same day and suffered simialr problems and if you can prove beyond resonable doubt that the problems with your car were actually caused by cross contamination you might get somewhere.

Perhaps a word with a local paper??

The simple fact is if Morrisons in Leyland had been selling diesel contaminate with petrol (or anything else) on March 8th you would not be the only driver affected. In the 3 weeks since you filled there would have been stories in the local press about owners with damaged cars caused by this issue.

For it to affect only one car, yours, is an imposibility. Supermarkets sell huge amounts of fuel (despite the usual stories about it being substandard).

So the the simple fact is unless you can find other affected people you yourself filled the car with petrol at some point after 8th March (when your receipt proves you bought diesel).

Several years ago I put petrol in my diesel car, added probably 5 gallons to the 3 gallons of diesel in the tank. It started to missfire within 1/2 mile, not 2 days later. Stopped immediately, car drained with new filter fitted, no damage done.

Morrisons have sold contaminated fuel in the past, it was well publicised and compensation paid if you had a reciept.

As said before, what proof do you have that the diesel is contaminated? Have the garage carried out a fuel analysis?

Many cars would have been affected by this were this to be true.

You say you ran your fuel tank down low before refuelling, more likely that you have distrubed some s***e in the bottom of the tank and this has worked its way down the fuel line, blocked the filter, etc......