Just come across this on PistonHeads.
Which? Car claim super fuels are pointless and there are no gains from it.. economy or performance...
They so wrong because when fuel prices were... lets just say "abit" too much i started using normal Shell petrol for couple of weeks... and boy o boy did i notice the shyt economy on it... when i went back to v-power the economy had improved incredibly... i've actually experienced that FACT...
and now im reading their report... i dont think they got it right.
I'm not just saying this but the car felt slower after a couple of tanks on normal fuel... now back on v-power its improved.
But the economy is the most noticeable thing for me by a long shot.