Originally posted by qtiger
The GSR ECU is smart enough to adjust timing. However, a chipped P28 is not.
Originally posted by Ross
i was not sure so i called the honda dealer and they said regulare is fine and the computer would adjust to it but you might hear a slight knock but it will go away and it is noting to worey about i also called and independent shop and aked and he said it is fine they only recomend premium for the increase in prefprmance
werd...so just put a higher grade in next time