I've always used 93 octane since I got my ride in april. It say's to use 91 or higher but I don't have that around here. There is also a station next to my work that has 94 and I've been using that alot more lately, noticed more mpg on the highway but no diff. in city driving.
I just feel better using the good stuff, it's not like your saving alot using the cheap stuff unless you drive a ton of miles anyway, the cheap stuff only saves you a buck or two at most each fill-up and I consider getting 1's back as change, are already spent on stupid stuff like snacks and drinks.
