I used V-Power Racing in the car and if has abit more bite.. but tends to return to normal fuel fairly quickly (i.e 2 days or so) so the first 2 days its full punch then after that it looses power back to about premium unleaded..
Not too sure about the factual evidence on this because my car is only brand new and has only been tried on 3 tanks full. but il report back if it happens again.
Luke
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