I posted a few weeks ago about an intermittent EML. Since I got the viechle back in November I've been using esso's supreme diesel and the EML was coming on intermittently every 30 miles or so. Now could be total coincidence but the last few times I've put fuel in I've used Morrisons basic...

what is the best diesel fuel for my bmw 330d sport ? and will i really notice any improvement in performance