I’m now on my 4th fill of V-Power. Mpg has improved. The acid test was a recent round trip of nearly 300 miles which I have done a number of times in this car. Same roads, same conditions and same speeds. 4 mpg better (44 v 40). In more normal driving I’m seeing just over a 3mpg improvement. The car generally feels more torquey to drive with much less throttle travel required to make progress. I’m going to stick with it I think. I’m seeing a decent mpg improvement and a much improved engine response so this, together with the additional cleaning benefits of this fuel make it worth me paying a premium for this fuel. My average mpg over 4 fills is 43.5 whereas it was 40 for many fills before that. I’ll keep monitoring this but the signs are good so far.