91 octane benefits?
05-22-2008 | 03:10 PM
#1
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From: Canada
91 octane benefits?
Hey guys, just wondering if there are any benefits to performance when running 91 octane in a stock 07' SS.
I just had enough 87 in the tank to get me to the station, and since my tank was pretty dry, i figured why not try some 91. I put in a little over half a tank just to test it out.
I just had enough 87 in the tank to get me to the station, and since my tank was pretty dry, i figured why not try some 91. I put in a little over half a tank just to test it out.
05-22-2008 | 03:11 PM
#2
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From: In a house.
Hey guys, just wondering if there are any benefits to performance when running 91 octane in a stock 07' SS.
I just had enough 87 in the tank to get me to the station, and since my tank was pretty dry, i figured why not try some 91. I put in a little over half a tank just to test it out.
I just had enough 87 in the tank to get me to the station, and since my tank was pretty dry, i figured why not try some 91. I put in a little over half a tank just to test it out.
05-22-2008 | 05:45 PM
#9
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From: Chilliwack, BC, Canada
You're not even supposed to put 87 in the 2.4L SS.........definitly not in the SS/SC. I've run 92 in my G5 GT since day one. The computer on the 2.4L does go into low octane mode, which pulls timing to protect the engine, but there definitly would be a power loss.......most likely slightly worse gas mileage as well.
05-22-2008 | 05:47 PM
#10
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From: Woodbridge, VA
Wrong and wrong... the SS/SC is the only Cobalt that 'recommends' 'premium' (91+) octane fuel in it; and even with the SS/SC, you CAN run 87 all the time if you wish, and the computer will just pull timing automatically.
05-22-2008 | 05:51 PM
#11
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From: Chilliwack, BC, Canada
LMAO, I could go photocopy my damn manual if you really don't believe me. You don't even own a 2.4L so don't come in here spouting your great knowledge on 2.4Ls.
05-22-2008 | 05:59 PM
#12
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From: Oakland, Ca
so tired of these octane and spark plug threads... can we get some gawd-damn stickies in this forum?
05-22-2008 | 06:04 PM
#14
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From: Chilliwack, BC, Canada
05-22-2008 | 06:10 PM
#16
I quoted the manual in a previous post
u can run 87 fine. i recently did it for about a month just to test it out. gas mileage hasn't suffered too much, but u can feel the acceleration difference. it's not too bad, but i wanna tune soon and i want everything where it should be
Originally Posted by zdeuce4
manual says " IF your vehicle has the 2.4 or the 2.0 sc use premium uleaded gasonline with a posted octane rating of 91 or higher. You may also use regular unleaded gasoline rated at 87 octane or higher, but your vehicle's acceleration may be slightly reduced, and you may notice a slight audible knocking noise, commonly referred to as spark knock. If the octane is less than 87, you may notice a heavy knocking noise when you drive. IF this occurs, use a gasoline rated at 87 octane or higher as soon as possible."
05-22-2008 | 06:15 PM
#17
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From: Canada
Jesus, i've been using 87 since we got the thing. I could have sworn the manual says 91+ is only required on the SS/SC, but I guess i am mistaken.
Just did some pulls with 91, and there is a noticeable difference.
Also a 'friend' was also doing the same thing as me, and this 'friend' just installed a ShiftPlus, and let me tell you 91 + ShiftPlus = CRAZY! (compared to 87 and stock)
Just did some pulls with 91, and there is a noticeable difference.
Also a 'friend' was also doing the same thing as me, and this 'friend' just installed a ShiftPlus, and let me tell you 91 + ShiftPlus = CRAZY! (compared to 87 and stock)
05-22-2008 | 06:27 PM
#20
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From: Canada
