Just thought I'd warn people about Morrisons petrol. I filled up there about 5 days ago and since then my car developed a misfire which got worse and worse. Cold start it was misfiring constantly and even when warm it would misfire and hesitate on throttle and judder about. My car is mapped for 95ron fuel, so it should be fine but the problem went as soon as I ran it to empty and filled up with Tesco 99. I thought I'd put 99 in as I seriously doubt Morrisons petrol is even 95ron. I also got FAR less MPG with this crappy fuel, so BE WARNED!