Smog Help~

i know and i searched
http://g2ic.com/forums/showthread.php?t=38911&page=1&pp=20&highlight=smog

but the thread was unclear
first part says preuim gas

then when read down more it says 87?
lol

Should i use 87 or 91?

gotta know since i have a state ref monday morning:)
thanks g2icers :clap: