ok since I have the car I have been using 88oct gas and my friend told me to swich to 93. so I did, ok , now I mention it to my parents and the go mad they say: "your car is program to run with 88 not 93" ,,, my ? is are my parents write or my friend,,, and if swiching fuel will hurt my engine?

thanx

 

What kind of car do you have (which model) and what does your owner's manual say?

 

Don't worry about it, its fine. Alot of us run 94. Atleast if its an ss/sc

 

The Cobalt SS/SCs should use 93 Octane. The 2.4s and 2.2s can use 88-93 Octane.

 

I have the 2.2L ,,, just to make shure I understand , ist ok to put 93 in it?

 

there is no benefit to putting 93 octane in the 2.2L cobalts

 

why not?

 

your engine isn't designed for higher octane and doesn't have a high enough compression ratio to benefit from it. The Octane rating for gas is basically how much it can be compressed before it will ignite. If a high compression engine uses low octane fuel, the fuel will ignite too quickly and cause the engine to retard the timing (loss of power) in more extreme situations you will experience engine knock, which can cause serious engine damage. A low compression engine running high octane gas doesn't have enough compression to take advantage of the properties of higher octane gas...basically your engine doesn't act any different.

The gas is not clearner, is not better for *your* engine and has absloutley no benefit on an engine that is not designed to use it, you are basically pissing away extra money. If you want a really good explanation I suggest searching google for information on gas octane.

 

that was a good explanation nice man

 

Save yourself about $700 a year on gas by going "87", never heard of 88 octane unless yuor refering to using 89.

 

Also never heard of 88.

 

Some places have 88 and some even have 86. I used to run 86 in the cavy and never had any problems with it.

Your motor will run best on 86-87 as it gets older you may want to change to 89.
You dont need to do this till your over 80K though.

Later

 

I've heard of 86 (rare to see them around the state unless you go pretty far up north)

But never heard of 88. Where can this be had? Obviously not a big deal but it's still interesting to see needless to say. Can't see it being any better then 87

 

Seems like some parts of the country get weird octanes. I remember seeing 85 in Colorado - it was up in the mountains, so maybe the altitude has something to do with it.

 

Um, he's in Puerto Rico. That might explain why they have a different octane?

 

thanx for the info Spoony and for the help you guys,,, yes im from Puerto Rico and we get weird oct maybe, for me is normal,,, also we in PR get gas not only from US but from Venezuela because of the oil been so $$ and the Venezuela oil is a little less $$,,

thanx again for the help , Ill make shure not to use high octane,,

belto

 

all three motors CAN use 87. the 2.0SC and 2.4 suggest 91 or higher. the 2.2 lists 87 on up.

 

Yes, but if you're in a 2.4 or 2.0 you're going to experience less performance, the engine will pull timing (which sucks bawls)...if you can't afford to put the proper gas in the car....what's the point of buying it in the first place.

 

Some areas of the country have stricter octane ratings. The reality is that a lot of these cheapo-gas stations use lower rated gas and just go with the 87 sticker. They also don't change their tank filters very often. Swhy people sometimes have problems after filling up at a place like that.

 

i'm not disagreeing, i'm saying that it won't hurt the car any.

 

Most modern engines can run off 87, they're tuned from the factory to recognize this and react accordingly. That being said, I don't understand why anyone would buy a performance car, then lower the performance of it by putting cheap gas in it...You buy a car for the performance, then you put crap gas in and get less performance...this makes no sense.

 

I totally agree with this statement. If you are going to buy a sports car, run the octane it suggests! If you are that picky about the extra couple cents /L then you shouldn't have spent that kind of money on the car in the first place.

When buying a car, the cost of it's gas shouldn't be something you think about cutting out on, just to run the car.