dont be cheap!!! use the proper fuel!!
does your work m8 have an R?
if not then tell him to shut up. if so then tell him you are amazed that its still running!
if you remap it to run on 95 you could do it. but you cant turn up the boost etc on shit fuel. this IS a performance car so you have to feed it performance fuel to get the proper running results from it.
please, with care, tell you m8 to think about it for a sec. you could run it on 95 but 1 rebuild cost more than the saving on fuel!.
and you should run it on 98 (well 100 really but 98 will do) so you get more performance and a better running car.
L.