edit: I just found that the s2000 needs premium unleaded.

So i take that back...the s2000 i think is the only "honda" car in the us that needs premium. The pilot might need more than 87, but it doesnt say on Honda's site under spec's for the pilot.

Still let me know on the gs-r, but that is an Acura. I'm sure more acura's need premium than regular unleaded, its the honda luxury line in USDM.

Dave