the only thing i would use in mine is v-power or tesco 99, preferably V-power if im being honest
my map was mapped to 98octane when i was apr'd, anything lower than this octane level the ecu would knock the timing back and my car would run flat as f@@k,
if your cars not mapped for the fuel octane you wont get any benefits from it apart from a cleaner running engine, if it is then you will gain about 5/6bhp from going from 95ron to 98+ron, this is what i got told regarding my map off awesome-gti
my map was mapped to 98octane when i was apr'd, anything lower than this octane level the ecu would knock the timing back and my car would run flat as f@@k,
if your cars not mapped for the fuel octane you wont get any benefits from it apart from a cleaner running engine, if it is then you will gain about 5/6bhp from going from 95ron to 98+ron, this is what i got told regarding my map off awesome-gti