R60BBA said:Have a read of the Millbrook report and make your own decision.
https://f30.bimmerpost.com/forums/attachment.php?attachmentid=1460676&d=1468877098
But the short answer is that V-Power is the best fuel on the market.
Really interesting read that, thanks for adding it

While its probably widely accepted that the V-Power is the "best" fuel on the market I would liken it to paying £100 for the "best" walking shoes for your hour walk vs the £30 general walking shoes. Are the £100 ones the best? Yeah sure but is it worth all the extra money for the very negligible difference? Not really.
If we were talking about a big power turbo car or some sort of NA supercar that was mapped for 99RON then yeah fine I'd absolutely say go V-Power but we arent, we are talking about a 4 pot e85.