what kind?

[94grandprix]

ok ive read the what is octtane sticky and also read the comments,ive seen diffrent opinions,some say the 3.8 sc will be fine with 87 gas in them,some say it will screw it up,some say it will be ok as long the pcm isnt tuned,some say it will knock and chip a piston or something,ive also heard that the 04 was redesigned to run 87 cause the pcm is factory tuned to,im VERY paranoid that it will blow my car up,so far 87 has did good,what signs do i need to look for that it may be doing harm,im wanting to buy a 04+ gtp and dont want to screw it up by putting 87 gas in it,i know they ''say'' premium only but in reality will it kill it,i know im not the only one that uses 87 and pretty sure the previous owners didnt either and at 198xxx it seems to be good to go,can i get some clear answers,thanks

[buickman104]

Scan the car and see how much knock you get on regular vs premium.

[94grandprix]

ok what is it suppose to be at?

[94grandprix]

what do you run?

[Explicit_Spade]

READ THE OWNERS MANUAL!

The manufacturer doesn't reccomend octane ratings for ****s and giggles.

[94grandprix]

Ok as I stated ^^^ I said I know it says premium

[Explicit_Spade]

I don't understand why you're trying to get away with running 87. Please elaborate on the purpose of this thread.

[94grandprix]

Because I wanted to know if it'd be ok,I've heard numerous rumors and just want to know the truth,is the 04+ really redesigned to run it??,I want to know signs to look for because I'm looking for another one

[Explicit_Spade]

Do you have a scan tool? You would want to look for Knock.

[BoostenGTP]

PREMIUM ONLY! Do not run 87 unless you plan to replace your engine in the near future.

[94grandprix]

Not yet i will soon,idk what it's suppose to be?

[94grandprix]

Boostengtp,is that 97-08 or 97-03?

[Explicit_Spade]

Not yet i will soon,idk what it's suppose to be?

Ideally, 0* KR is what you want.

Factory is about 2-3* on 91 octane 97-03. Most 04+ seem to read a little higher due to "false knock".

[94grandprix]

So I'll run 91 for now on and kr needs to be 0 or 2-3,what if it isn't?

[Explicit_Spade]

http://www.zzperformance.com/blog/ab...ock-retard-kr/

[REDCRAPGP]

Dude..

Run premium aka 91 or 93. No matter if it's a 04 or a 97-03 they both will go boom if you continue to run unleaded. Knock is your biggest enemy! Well aside from our ****ty transmission.


Would you rather spend a few more bucks feeling up or spend more then that replacing your motor ?

[Explicit_Spade]

they both will go boom if you continue to run unleaded.

You run leaded gasoline? Do you drive something from the 40s?

[REDCRAPGP]

87 I meant. It's 4am expect errors

[94grandprix]

Ok I just wanted to clear things up,does this apply to na to or just sc?

[94grandprix]

I knew what you meant