quick ? on gas grades

[captains]

car says premium only, will it hurt to run regular. Ran 2-4 tanks of regular through it and it ran fine. then switched back to premium incase i would get problems long term

grand prix gtp

 

[Gunslinger08]

Originally posted by: captains
car says premium only, will it hurt to run regular. Ran 2-4 tanks of regular through it and it ran fine. then switched back to premium incase i would get problems long term

grand prix gtp

Run premium. It's not a good idea to try to save a few bucks on lower grade gas when dealing with a multi-thousand dollar machine.

 

[chcarnage]

Gas with too low octane rating may damage the engine.

 

[EKKC]

go with the car manual
if your manual say 87, anything above is waste of money

if your manual say 93, anything below will damage your engine in the long run

 

[Gunslinger08]

Originally posted by: EKKC
go with the car manual
if your manual say 87, anything above is waste of money

if your manual say 93, anything below will damage your engine in the long run

If it says 87, anything above could damage it as well. Higher grades burn hotter which can be detrimental to certain engines.

 

[V00DOO]

Originally posted by: chcarnage
Gas with too low octane rating may damage the engine.

Also you may get a worser gas mileage with lower grade gas since you engine was designed for premium gas.

 

[FoBoT]

get a new car

 

[thirdeye]

If the car calls for it, use it. It's not there because your car was designed by the money hording gas company. Especially if that GTP is supercharged. FI and low octane do not mix well unless you want to kill your engine.

 

[TGS]

Cliffs: OP uses gas that will compress at too low of a rate and "autoignite" in the cylinder before the correct ignition cycle comes around. AKA knocking.

----

I actually read about this on howstuffworks, which I see they link to anyways. All from the oil refining process article they have, which is quite interesting on how they extract the various hydrocarbons from the crude.

Also I didn't know the history of leaded gasolines. Which the link above talks about.

 

[imported_Pablo]

Originally posted by: V00DOO

Originally posted by: chcarnage
Gas with too low octane rating may damage the engine.

Also you may get a worser gas mileage with lower grade gas since you engine was designed for premium gas.

Dear God,

Please, let V00DOO learn that "worser" is not a word. Or, if that is not your will, please smite him, quickly and painlessly.

Your friend in Christ,
Pablo

 

[Zenmervolt]

Originally posted by: joshsquall
If it says 87, anything above could damage it as well. Higher grades burn hotter which can be detrimental to certain engines.

No. Actually, they burn slightly colder which increases the amount of carbon buildup when used in engines not designed for higher grades.

Higher octane fuels burn slightly more slowly and ignite less easily.

ZV

 

[alien42]

i also have to use premium and look at it this way...premium is always .20 more per gallon so the higher gas prices go the closer we pay to everyone else percentage wise.

 

[Epic Fail]

Originally posted by: Pablo

Originally posted by: V00DOO

Originally posted by: chcarnage
Gas with too low octane rating may damage the engine.

Also you may get a worser gas mileage with lower grade gas since you engine was designed for premium gas.

Dear God,

Please, let V00DOO learn that "worser" is not a word. Or, if that is not your will, please smite him, quickly and painlessly.

Your friend in Christ,
Pablo

We betterer learn or we will get smited.

 

[TGS]

Originally posted by: Zenmervolt

Originally posted by: joshsquall
If it says 87, anything above could damage it as well. Higher grades burn hotter which can be detrimental to certain engines.

No. Actually, they burn slightly colder which increases the amount of carbon buildup when used in engines not designed for higher grades.

Higher octane fuels burn slightly more slowlyand ignite less easily.

ZV

Did you read the articles?


edit:

Higher octane ratings correlate to higher activation energies. Activation energy is the amount of energy necessary to start a chemical reaction. Since higher octane fuels have higher activation energies, it is less likely that a given compression will cause knocking.

Octane has nothing to do with ignition temperatures or with burn rates. It has everything to do with the resistance of the fuel to premature ignition, which causes "knocking". The knocking of the engine is what will cause physical damage to the engine of the course of time.

 

[Pepsi90919]

RTFM

 

[zanieladie]

Sounds like the consensus is that you shouldn't try to skimp - not matter how tempting it might be with the absurb price for a gallon of gas.

 

[Eli]

Originally posted by: joshsquall

Originally posted by: EKKC
go with the car manual
if your manual say 87, anything above is waste of money

if your manual say 93, anything below will damage your engine in the long run

If it says 87, anything above could damage it as well. Higher grades burn hotter which can be detrimental to certain engines.

Uh, this is false.

Higher octane gasolines burn cooler. They can lead to carbon buildup because of this.

 

[Eli]

Originally posted by: TGS

Originally posted by: Zenmervolt

Originally posted by: joshsquall
If it says 87, anything above could damage it as well. Higher grades burn hotter which can be detrimental to certain engines.

No. Actually, they burn slightly colder which increases the amount of carbon buildup when used in engines not designed for higher grades.

Higher octane fuels burn slightly more slowlyand ignite less easily.

ZV

Did you read the articles?


edit:

Higher octane ratings correlate to higher activation energies. Activation energy is the amount of energy necessary to start a chemical reaction. Since higher octane fuels have higher activation energies, it is less likely that a given compression will cause knocking.

Octane has nothing to do with ignition temperatures or with burn rates. It has everything to do with the resistance of the fuel to premature ignition, which causes "knocking". The knocking of the engine is what will cause physical damage to the engine of the course of time.

Uh, you don't know what you're talking about.

Higher octane fuel burns slower and cooler than lower octane fuel. Nowhere in the line you quoted does it suggest that octane rating has nothing to do with burn temperature or burn rate.

 

[brxndxn]

When I got my used Camaro, it didn't come with a manual. I called Chevrolet and they told me premium will give better acceleration and they said it will run better. They said it wouldn't hurt to use 87, though.

From my experience, 93 seems to make my car run smoother than 87. So, I don't care what anyone else says.. my car runs better on 93.

 

[Zenmervolt]

Originally posted by: TGS

Originally posted by: Zenmervolt

Originally posted by: joshsquall
If it says 87, anything above could damage it as well. Higher grades burn hotter which can be detrimental to certain engines.

No. Actually, they burn slightly colder which increases the amount of carbon buildup when used in engines not designed for higher grades.

Higher octane fuels burn slightly more slowlyand ignite less easily.

ZV

Did you read the articles?


edit:

Higher octane ratings correlate to higher activation energies. Activation energy is the amount of energy necessary to start a chemical reaction. Since higher octane fuels have higher activation energies, it is less likely that a given compression will cause knocking.

Octane has nothing to do with ignition temperatures or with burn rates. It has everything to do with the resistance of the fuel to premature ignition, which causes "knocking". The knocking of the engine is what will cause physical damage to the engine of the course of time.

Did you read what I wrote?

I agreed that higher octane fuels are more difficult to ignite.

However side effects of the methods used to raise octane result in a slower-moving flame front in high-octane fuels, as well as a slightly slower burn rate. This translates into slightly cooler combustion temperatures which means that when high octane fuel is used in an engine that does not require it, the fuel is not burned completely and carbon deposits are increased.

The octane rating only indicates resistance to auto-ignition. But the side effects of that are as listed above. Some very high octane fuels burn so slowly that the mixture is still burning when the exhaust valve opens and the flame will exit the combustion chamber (for example, mixtures with a very high percentage of tolulene).

ZV

 

[BW86]

Wouldn't running lower octane gas just set off the knock sensor? Which would retard the timing?

 

[Eli]

Originally posted by: BW86
Wouldn't running lower octane gas just set off the knock sensor? Which would retard the timing?

Yes, as long as your engine is so equipped.

 

[funboy6942]

Originally posted by: Pablo

Originally posted by: V00DOO

Originally posted by: chcarnage
Gas with too low octane rating may damage the engine.

Also you may get a worser gas mileage with lower grade gas since you engine was designed for premium gas.

Dear God,

Please, let V00DOO learn that "worser" is not a word. Or, if that is not your will, please smite him, quickly and painlessly.

Your friend in Christ,
Pablo

In the dictionary as a non standard way of saying worse.
May want to get used to it because it will become like the word Ain't
Ain't wasnt a word till it made it into the book and now.......its a word but not worser then worser