Fuel Grade?
04-14-2005, 01:21 PM
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Fuel Grade?
what grade fuel does the cobalt require?
2.2L (regular, mid, or premium)?
2.0 (regular, mid, or premiu,)?
i have been looking around but can never find the type/grade of gas that goes in.
2.2L (regular, mid, or premium)?
2.0 (regular, mid, or premiu,)?
i have been looking around but can never find the type/grade of gas that goes in.
04-14-2005, 02:06 PM
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04-14-2005, 05:25 PM
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That's the problem with most cars, they set the chip to allow use of the impossibly low grade of fuel (like 87)? Hampers performance even if you put in proper fuel, like at least 95.
04-14-2005, 05:33 PM
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Originally Posted by hokman
That's the problem with most cars, they set the chip to allow use of the impossibly low grade of fuel (like 87)? Hampers performance even if you put in proper fuel, like at least 95.
The highest we can get around here is 94. The US is strictly R+M/2 I have heard of other countries using different systems that producde results that are not on the same scale as R+M/2.
04-15-2005, 07:22 AM
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putting in anything higher than 87 in a standard US made engine that is in good running condition is just a waste of money (for the most part), you gain no performace and if you don't have good spark plugs/ignition system can actually dmg your engine.
Higher octance means LESS combustibility. yes it might be "cleaner burning" (depending on definition) but impurities are going to be the same between octanes for the most part and only vary by brand. some cars differ and will respond better with different fuels, yes, but higher performance cars need a higher octance to prevent detonation, or early ignition of the fuel do to increased cylinder pressure or higher temps in the engine, the higher octance feul combusts at a higher temperature, but also burns a bit quicker giving a higher performing engine more control over combustion timing and length. but for a regular car, this will not make a difference as it is not tuned to take advantage but is most likely made to the lowest common denominator with much broader tolerences.
Higher octance means LESS combustibility. yes it might be "cleaner burning" (depending on definition) but impurities are going to be the same between octanes for the most part and only vary by brand. some cars differ and will respond better with different fuels, yes, but higher performance cars need a higher octance to prevent detonation, or early ignition of the fuel do to increased cylinder pressure or higher temps in the engine, the higher octance feul combusts at a higher temperature, but also burns a bit quicker giving a higher performing engine more control over combustion timing and length. but for a regular car, this will not make a difference as it is not tuned to take advantage but is most likely made to the lowest common denominator with much broader tolerences.
04-15-2005, 09:14 AM
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The previous post is mostly correct. Octane is a detonation-retardant. Gasoline with a higher octane rating can be heated and compressed more before it ignites on its own versus gas with a lower octane rating.
In our superchaged engine, much higher cylinder pressures and temperatures are achieved as a result of the supercharger, so you need gasoline with a higher octane rating in order to prevent the charge from detonating.
You can use a lower grade, however the engine controller will sense the lower grade gasoline, and will retard the ignition spark to prevent damage. This, essentially, is igniting the charge before cylinder pressures reach so high a level that the charge detonates on its own. Because cylinder pressures are lower, performance is hurt.
Canada uses R+M/2 as well. There generally is not much difference in octane content in a 91 from Canada vs. 91 from the US.
Use 91 or higher, and you'll be fine. If you have to put a tank of 87 in, it won't hurt anything long term, but you won't get optimal performance on that tank.
There is NO use in putting anything over 87 in a 2.2L Cobalt or any other car not requiring it. People sometimes think it's "better" gas since it's more expensive. It's just throwing your money away.
In our superchaged engine, much higher cylinder pressures and temperatures are achieved as a result of the supercharger, so you need gasoline with a higher octane rating in order to prevent the charge from detonating.
You can use a lower grade, however the engine controller will sense the lower grade gasoline, and will retard the ignition spark to prevent damage. This, essentially, is igniting the charge before cylinder pressures reach so high a level that the charge detonates on its own. Because cylinder pressures are lower, performance is hurt.
Canada uses R+M/2 as well. There generally is not much difference in octane content in a 91 from Canada vs. 91 from the US.
Use 91 or higher, and you'll be fine. If you have to put a tank of 87 in, it won't hurt anything long term, but you won't get optimal performance on that tank.
There is NO use in putting anything over 87 in a 2.2L Cobalt or any other car not requiring it. People sometimes think it's "better" gas since it's more expensive. It's just throwing your money away.
04-15-2005, 11:47 AM
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What about the oil
Hey guys i'm trying to get my friend to bring me back some oil from Germany because they don't sell american here in Italy. I don't have my car yet so my question is, if the 2.2 uses 5W 30? And I saw on another thread about using mobil1. Is that also a recommendation for the 2.2?
04-15-2005, 08:15 PM
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Originally Posted by NiteViper
what grade fuel does the cobalt require?
2.2L (regular, mid, or premium)?
2.0 (regular, mid, or premiu,)?
i have been looking around but can never find the type/grade of gas that goes in.
2.2L (regular, mid, or premium)?
2.0 (regular, mid, or premiu,)?
i have been looking around but can never find the type/grade of gas that goes in.
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