You are right - supermarket fuel is cheap for a reason - they are supermarkets and their buying power is vast. Its the same with electrical goods or even tins of beans. You can pay more for the same product if you want, but that doesn't make it a better product. MANY proiducts are sold on the snobbery of their name without deserving their higher price.
Make no mistake, if v-power proved better, its what I would use. As I said, I haven't tried BP Ultimate because of the higher price charged over and above v-power. And I've seen nothing to suggest BP Ultimate is better than v-power. If you have, I'd be grateful if you'd point me in the right direction.
If cheap was all that mattered, I would fill up with standard unleaded and not pay the premium for super unleaded. And the engine so far has no complaints. If I put my foot down, this baby moves!! And I'm getting an all-round MPG (mixed driving) of pretty much 30.
I've run many, many cars on fuel from all different suppliers and have never suffered any engine damage from any of them. What damage did you suffer ? I'd seen the recent news where a distributer sent out contaminated fuel to their clients, but not heard of any other instances. As it happened, I don't use the supermarkets affected anyway.
What mileage are you getting with BP Ultimate ? The additional cost is around 8% more, so if I can get another 2-1/2 MPG out of it over 97 RON, it will balance out.