I use esso super which is only 97 ron (1.8 TSI) and there is an increase of 2-3 mpg over the esso 95 ron, I didnt notice any less performance on the odd occasions i used 95 but I was only on less than 1000 miles so still bedding in. I might try V power and see how i get on with that, but i generally think the premium is worth it for any turbo engine