SS-Jordan

hey so in my manual, (2006 Cobalt SS 2.4L) It says that premium is recommended otherwise i will lose acceleration and maybe get some minor knocking. So i told my friends i'm going to fill with premium and they just laughed, saying "its just a cobalt" I know its not the super or turbo charged, but which fuel should i use?

...right now with 87 im getting 9.5/100km in town and around 6.5 on the highway, will premium make a dif?

G5GT2007

don't listen to your dumb ass friend put the 91 in the car.nothing but 93 goes in my 2.4.

Melon

iTrader: (11)

i miss 93. have to run 91 by default

Vander Nars

iTrader: (5)

Run what is recommanded, there is a reason its recommanded

padlock

iTrader: (9)

no need to run 93... 91 will be fine if it requires higher octane.. heck ss/sc and ss/tc's only need a min of 91 octane (given they are stock)

chevygirl2006

i ran 87 in my 2.4 for 2 years and it ran perfect then i changed to 93 after i got retuned and now my car is running bad :/

Mindrot

iTrader: (1)

93 octane. Just use it.

ItalianJoe1

iTrader: (10)

Only time it affects anything is at WOT and under high loads at high temperatures. You will be more prone to detonation with a lower-grade fuel, but the car will run just fine on it.

You won't get better mileage out of higher octane gas, as it takes more energy to burn it actually has the effect of slightly retarding timing, so it will make ever so slightly less power, all things equal. If you are getting knock and the car is reducing timing, then you will feel more power with more octane, because the car can run the full desired ignition timing.

StevoElSupremo

I put premium in the car... its a few bucks more per tank but it really does run better (sans 2.2L)

Vander Nars

iTrader: (5)

U may have gotten a bad tune, you should have it looked into.

chevygirl2006

That's what I've been saying to alot of people but they r like I doubt it's ur tune. And my tuner lives like an hour and half away.

matt638

E85