if i brought a brand new car i think i would use optimax fuel in it, dont they claim it burns alot cleaner in the long run and better for the condition of the internal parts of the engine, thought i saw a example engine what they run on optimax for a certain amount of miles and another engine of the same type and they took it apart and the optimax one was nice and clean inside, but the normal unleaded one didnt look as good,

but i suspose this is there selling point!