from my opinion, its tunable. use ron95 tune to ron95, use ron97 tune to ron97. that all. if use ron95, even on tune have to drive the car less aggressive cause u can't push the car since u already push to use ron95 right? have to drive according to situation. example, drive with less passenger can push the car...if heavy load have to drive conservative, have to drive with the correct gear. if drive during night or morning time when the air temp is lower can push the car a bit. this sounds like u r driving a turbo corvert??? but this is a way to preserve the engine. to push the car at the right moment, right time. coz type r was born to push hard, but with ron100. use lower ron then don't push...
then many will say why buy it? some people dream to own a fd2r coz its the best NA car from Honda. the exterior, interior first class. not all want to race the car?to race when you want to but for ron95 case, race when the situation allows it. if you ask me, i could live with it. but if lets say ron95 bhp gives knock all the time, then i surrender.hands down...