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.)

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=DOHNER=
SILVER 2002 GT

No, not really. The stock tune is designed to run on regular grade and won't see any benefits from the increased octane.

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2004 Impala LS - got some mods
NAIOA Moderator

Making you think twice before picking on Impalas

Dang that sucks LOL it was just a thought. Thanks alot.

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=DOHNER=
SILVER 2002 GT

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.

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=DOHNER=
SILVER 2002 GT

It won't hurt it. Otherwise there would be a warning that says "No high octane fuel".

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2004 Impala LS - got some mods
NAIOA Moderator

Making you think twice before picking on Impalas

Well put.

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1999 Silver GTP~HP Tuners~XP cam~ZZP FS Intercooler~#4 FMHE~ZZP 78mm Billet Throttlebody~LQ4 MAF~Lucas 42.5's~ZZP SS Headers~2.8 MPS~PRJ fuel logs~Ported & Polished S/C~TDCRacing FWI ~Built Tranny-3.29's-7/8's chain-Intense forged Input Shaft~

Running mid-high 12's
Get you're TDCRacing Fenderwell Intake Today!

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

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'06 GP GT S/C...20" chrome Alloy wheels, Kicker L7 Subs, 4-piece grille, white underbody lights, dvd/nav. , tint, custom chrome, custom FWI, 104 plugs... more coming...

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/w...here-1507.html (What is octane? KR? Explained here.)



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.

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GreenBastardPerformance2000 GTP Coupe (the green bastard)
XP, Pacesetters, LS1 TB & MAF,MSD System, P&P LIM, P&P GenV w/ 3.2, 3.0, 2.8, Devil'sOwn Injected 100% Methanol,PowerTuned, TripleEdge Trans w/3.29's
12.92 @ 105mph