in my oppinion v-power makes no difference,ive run mine on both n theres nothing to tell other than it went forward and backwards lol,the fuel is coming down because asda has started a war,they started dropping the price of fuel off their own back and everyone is doing the same to compete,so a massive thank you to asda,and lets face it if it wasnt for the super tax on fuel itd prob cost the same as gas!