JAG beat me to it Seen that program unless your car is a fairly high performance car there WONT be a perfomance increase. Not saying it wont run better though. I always run the GT on super, most of the time V Power but if I couldnt make it to a Shell garage, Tesco super. I wont be going anywhere other than Shell garages when the GT is back running, I think that was part of the problem after it was mapped for V Power. by the way I am in the V power club and never seen that energy drink!! I want!!