This stuff again, LOL

Yes you can use 87 oct. Thats what the car was MADE for.

But the car also has a knock sensor, and by adding 93 oct this sensor adjust some things and this gives your car about 10hp more.

This is somthing thats went back and forth forever.

All you people saying "my book says regular so I am going to use it." can do that, but just because it dont say other stuff dont mean you cant use it.... Your book also says crap like only use honda OEM bla bla bla and only use xxx kind of oil but you can use another brand oil and be fine....

So you see just cuz the book lacks telling you your car can get 10hp more by using 93oct or 91, does not mean your car can not do it, they are just telling you the car can run the cheap stuff because thats what an average person wants to know, "can I use the cheap shi*"