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Running higher grade fuel.

Dohner

Dohner

New member
I was just wondering if running like 94 octain would give me a noticable power boost. I was at work today thinking about that. I thought i would throw it out on here and see what the pros and cons are of doing this.
(P.S MY CAR IS A STOCK 02 GT.)
 


No, not really. The stock tune is designed to run on regular grade and won't see any benefits from the increased octane.
 
I also have a stock 2002 gt I got premium awhile ago cause the station was out of regular so it was the same price. I noticed it ran a bit smoother and got slightly better gas milage to that tank. Nothing too spectacular though. I could have just imagined it ran smoother since I knew I had the premium in it, haha.
 
Ha Ha i might just have to try some high grade fuel see if i do get better mpg and the runability of the car as long as it wont hurt it. Anyone know of anything bad happening to it if i do run higher grade.
 


Gods honest truth dude thes motors are not built to run premium fuel. It will run it yes. It will run better yes. But if you continue to run premium fuel every time you go to the gas station you will have a massive carbon build up on the motor and it is not very fun what so ever to get that stuff out of your heads. I have seen this so many times in our shop of people running premium and only driving around town. You need to get it out on the highway every now and then.
 
i used to always run 93 octane, I got REALLY good MPG with it and I also starting having some idoling problems with it so I still dont use 87 but 89 insted now...but MPG is still great
 
Run the recommended fuel for the car. A GTP is built for premium unleaded, a GT is 87 octane. Running a higher grade fuel usually will result in a loss of horsepower if you don't have the means of maximizing your full potential to run that fuel.

http://www.grandprixforums.net/f18/what-is-octane-kr-explained-here-1507.html



snap on said:
if you continue to run premium fuel every time you go to the gas station you will have a massive carbon build up on the motor and it is not very fun what so ever to get that stuff out of your heads. I have seen this so many times in our shop of people running premium and only driving around town. You need to get it out on the highway every now and then.
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Partially true. Any engine will build up carbon if all you do is putt around town. You've got to clean the cobs out of them every once in a while.

Cadillacs are notorious for this, because they are basically a performance luxury. The engines are performance designed, but older people buy them. Then they will bring the car back in a few months later complaining it's running bad and pinging. All the tech basically does is put some top engine cleaner in it, then takes it out on the freeway to flog on it.
 


Hello New to this forum and my first Pontiac is a 97 Grand Prix SE, Just wondering about arco gas, I hear alot of bad stuff like people don't use it in newer cars, how about in the grand prix's would you recomend arco, or is it better and advised to use shell or cheveron etc.
Thanks.
 
Dohner said:
Which company carries arco gas i guess i have never heard of it
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It's a gas station over here in Washington.called Arco there gas is usually 5 - 8 cents cheaper then other gasstations. the only difference I have seen is I got better gas milage from the other gas stations(shell, Cheveron ETC) with my olds, havent went to an arco gas station w/ grand prix.
 
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I have a friend who ran racing fuel in his 2000 V6 Firebird (W/ 3800). He said the gas gauge would move up and down from quarter tank to almost full. It stoped after he was burned it all though.

Any reason why this might happen?
 


grand prix newb said:
It's a gas station over here in Washington.called Arco there gas is usually 5 - 8 cents cheaper then other gasstations. the only difference I have seen is I got better gas milage from the other gas stations(shell, Cheveron ETC) with my olds, havent went to an arco gas station w/ grand prix.
Click to expand...

I would watch using that gas, usually a low grade fuel when they can have their price that much cheaper than others. I'd stick with the gas you know.
 
I checked out my owner's manual, ('04 GP GT), and it said not to use ethanol because the car wasn't designed for it. I think my local convenience store carries gas with a small amount of ethanol in it. I have been gassing up there about half the time, with no apparent ill effects.

How serious is this warning?

-Ralphie
 
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