should i be running premium in my gsr or is 89 alright?

Premium is recommended. Do as you wish though since some people say they do regular fuel in there B18c. You could get away with it but I wouldn't count on that. One bad tank of crap regular fuel and here we come horrible performance and maybe some light detonation. I wouldn't touch anything but 91-93oct in a B16A or B18c.

honestly gas is so expensive now that paying the extra 10 cents for premium is not a big deal. my bike takes only premium... so now i do it in my car too... better economy and performance. means i could fill up less and maybe save a buck

i wouldnt go anywhere under 91 in mine.. i think i've done that ONCE and just like taylomade07 said.. its only .10 extra a gallon so its not hurting that much more outta your pocket..

would you rather be paying (jus random numbers):
$40 on 89oct and risk minor flaws
or
$44 on 93 and rock the hell outta it

seriously if you fill up once a week its only and extra 16bucks i dunno about u but I spend that at the bar on like 2 drinks() or at the movies easily on food. just to have ur car run a little better

93 octane is the way to go
Our weedeater was having problems so we took it to a shop
and they did a gas check
and it was 40% water
so now we even run 89 in all of our equipment
But go premium on the real