A lot of the 'premium' branded fuels such as v-power include a superior blend of additives offering increased engine protection. There used to be some talk of supermarkets using near raw fuel = very bad for consumer car engines but I don't think thats been proven or disproven to be honest. As for me I just use shell vpower for the norm but for the mini I may just stick to std shell - as long as I'm getting the additive (no pun intended) protection thats good enough for me.
