As a dedicated Tesco diesel customer and being in the wilds of Scotland yesterday I had to fill up at a BP outlet. Inadvertently I filled up with BP's 'ULTIMATE' grade at 10p over the regular price! That was bad enough, but on filling up at the end of my return journey I was horrified to find that I had achieved 4.5 miles per gallon less than on my outward journey! Just wondered if anybody had any similar experiences or is this the stuff 'ULTIMATE' rip-off!!! Sorry! read full review »