ALOT of people are having massively expensive issues with fixing cars due to bad diesel fuels which fark your diesel motors up really bad as well.
I know someone who had a 3K+ plus repair bill due to bad diesel .
We have a Diesel I30 and always fill up at the same servo (unless out of town) that is also popular with the local truckies .. but refueling is always a gamble these days I spose