#1184238 - 03/23/07 09:05 AM
Re: Which # Octane gas for my SI
[Re: SickSi99]
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99redSiR
Post Master
Registered: 11/23/04
Posts: 2422
Loc: Hamilton Ontario
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the lowest i have ever used.. is 91.. but 90% of the time i use 94.
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#1184611 - 03/23/07 10:50 AM
Re: Which # Octane gas for my SI
[Re: SickSi99]
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oni
Major Member
Registered: 04/16/05
Posts: 1412
Loc: Pennsylvania
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premium gas only like it says in the owners manual even on the inside of the fuel door.
Yes, Honda states in the manual to use 91.
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#1184625 - 03/23/07 10:52 AM
Re: Which # Octane gas for my SI
[Re: 99redSiR]
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oni
Major Member
Registered: 04/16/05
Posts: 1412
Loc: Pennsylvania
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the lowest i have ever used.. is 91.. but 90% of the time i use 94.
Using 94 isn't needed. Unless you're running a CR higher than 12:1 you're throwing your money away.
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#1202670 - 03/29/07 12:33 AM
Re: Which # Octane gas for my SI
[Re: MyFirstSpoon]
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Kusgan
Jr Poster
Registered: 12/09/05
Posts: 196
Loc: CT
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my 2k si manual says 91 or above....
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Your common sense is located at the tip of your sacrum!
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#1217944 - 04/03/07 12:02 AM
Re: Which # Octane gas for my SI
[Re: Kusgan]
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BrianGriffin
Newbie
Registered: 03/08/07
Posts: 23
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If the manual says to use premium, then absolutely use that. If it didn't require it, I would use the cheap stuff myself.
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#1220125 - 04/03/07 05:11 PM
Re: Which # Octane gas for my SI
[Re: MyFirstSpoon]
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polishtom89
Jr Poster
Registered: 04/04/06
Posts: 93
Loc: Justice IL
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u should never use anything lower than 91 octane. i always put in 93
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#1247545 - 04/11/07 08:38 PM
Re: Which # Octane gas for my SI
[Re: strsi]
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92Notch
Post Master Jr
Registered: 06/22/00
Posts: 1624
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Great thread! I was going to ask the same question. Some clown plowed into my Mustang last week and its totaled, I'm pretty pissed off about that. Been sporting my sisters Si (2000, a nice blue color) ... anyways she told me to run 87 in it, I did not think that was a good idea (I was just quessing the si is a high compression motor requiring greater then 87 octane)... She's got some mods on this thing, an AEM intake, timing gears (or something like that ... she changed some pullies under the timing cover), a header and cat back, and some computer thingy in the glove box that shows the RPM digitally and has a ligt that comes on if you rev it up to 4500rpm or higher (I have no idea what it is, guessing its some kind of engine controller), and other stuff i do not know about probably (my stang... was still quicker  ) ...Anyways, I've been running 93 in it, it seems to run better w/ it.... I'm guessing that's a good idea, or could that controller thingy be allowing the use of 87 somehow? BTW, I am not (was not) a Honda fan, but this si is a sweet ride, it really is.
Edited by 92Notch (04/11/07 08:42 PM)
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[This message has been edited twice by 92Notch™ on June 14, 2001 @ ]
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#1259017 - 04/15/07 08:59 AM
Re: Which # Octane gas for my SI
[Re: oni]
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StOBeR
Newbie
Registered: 04/15/07
Posts: 51
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93
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#1261059 - 04/15/07 10:03 PM
Re: Which # Octane gas for my SI
[Re: StOBeR]
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SiKaren07
Poster
Registered: 03/09/07
Posts: 206
Loc: Scranton, PA
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Look in your owners manual, page 180 and it will explain everything you need to know, but to make things simpler....91 and higher aka premium unleaded gas...
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 "The only way to get ahead in life, is to drive like a jack ass..." ________________________ '07 NBP Civic Si ~ Navi ~ 18" HFP Wheels ~ AEM CAI
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#1294724 - 04/25/07 08:50 AM
Re: Which # Octane gas for my SI
[Re: SiKaren07]
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CivDog97
Jr Member
Registered: 01/13/01
Posts: 396
Loc: Chi-town Burb.
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93 is what I pump. Nothing less for my Si.
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"Oh Yeah, Well I'm A Mushroom Cloud Laying Muthafucka, Muthafucka"-Pulp Fiction.
00 FBP Civic Si
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#1295473 - 04/25/07 11:25 AM
Re: Which # Octane gas for my SI
[Re: CivDog97]
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civicbooty
Post Master Jr
Registered: 01/12/03
Posts: 1708
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its funny though, you will find since the si came out there really hasnt been one owners manual that says to get anything less than premium unleaded gas... ie 91 in cali...
just something for everyone to think about....
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