just a curious question. i have put a thread up in engine trouble shooting about my mpg. a friend of a friend works at vauxhall and said Morrison and Tesco is basically watered down fuel. not literally water but scraps of whats left from BP and esso. is there any truth in this as if so i will go to esso. wanting to try increase my mpg and if morrisons use rubbish fuel i will leave. also for the cost what do you get extra with ultimate diesel?
many thanks for your time