Wat octane do u guys drive on. here on long island we have 87, 89, and 93. i used 89 once and 93 twice since i got my car 2.5 weeks ago which do u prefer jus for like cruisin, not rele racin. and is there any difference in MPG between octanes? thanx again

 

is your cobalt the ss or higher. 2.4 or 2.0. those are strickly 93 or higher octane. i think the 2.2s have 87 or higher.

ryan.