funny enough, mines running on 95 at the moment!!, traction issues yes i know!!, but have also noticed the car doesnt have it's crisp responce feeling that i get with using 99 (when dam tesco's get it back in stock).mpg suffers by about 2 miles per gallon less on 95 then 99.
Im right in thinking both shell and tesco's fuel are refined together so the Vpower is in fact the same product. T.T had posted a while back confirming that both these fuels are from the same source and in some cases out performed Vpower in tests. Take the cheaper option, get your club card points and get £20 free shopping a month from using it like i do!!!. Sorry i dont trust using shell garages or Jet stations for card fraud that regually happens due to the cheap labour workers they employ to scam your debit card which happens alot.( i never carry cash)