mine was mapped on 97 ron always use shell if i can if not i put the 97 in
to be honest the shell doesn't make any differance to my car
i could put 102 ron wouldn't make any differance either as it's not mapped for it
the major differance the way the car pulls/feels when the outside air temp is cold
like these winter mornigs
dont belive the bullshite .... if your car is mapped on 97 ron then the higher octane fuel wont make it produce any more power all the higher ron will do is protect the engine as it's better fuel
marco
marco