I dunno but the sticker on the fuel door in my Max says Premium fuel recomenede for Maximum performance, they say 87 is fine but I never tried putting 87 in. I can feel the car runs smooth as hell on 110 oct race gas, in my area 93 is normal premium gas. Race gas burns cleaner than regular gas, plus it smells very good :) Mike Jez 01 Max 93 SE-R with 110 oct fuel in tank all the time driven rarely. 90 Max runs on anything.