Welcome to the North American Subaru Impreza Owners Club Thursday October 23, 2014
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Here you can view your subscribed threads, work with private messages and edit your profile and preferences Home Registration is free! Visit the NASIOC Store NASIOC Rules Search Find other members Frequently Asked Questions Calendar Archive NASIOC Upgrade Garage Logout
Go Back   NASIOC > NASIOC Archives > NASIOC Archives > STi Forum Archive

Welcome to NASIOC - The world's largest online community for Subaru enthusiasts!
Welcome to the NASIOC.com Subaru forum.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, free of charge, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!

If you have any problems with the registration process or your account login, please contact us.
* Registered users of the site do not see these ads.
 
 
Thread Tools Display Modes
Old 03-26-2003, 12:16 AM   #1
Sothoth
Scooby Newbie
 
Member#: 4051
Join Date: Feb 2001
Location: Bigfoot Country
Vehicle:
2005 WRX STi
Black / Gold

Default What gas to use in your STi?

In quite possibly the dullest thread ever, I was just wondering what everyone uses for their gas?

I personally use Chevron Supreme (92). I don't switch from this brand, as I assume the performance of my WRX will hold steady. Or is this an urban myth?

Does anyone use another brand that they prefer? Is there a 93 octane readily available or higher? What are STi owners going to be feeding their beasts?

Does anyone care?

Sothoth is offline  
Old 03-26-2003, 01:46 AM   #2
JT-KGY
Scooby Specialist
 
Member#: 7852
Join Date: Jun 2001
Location: Alhambra, CA
Vehicle:
03 White Lan EVO 8
97 Techno-Violet BMW M3/2

Default

It's a turbo charged high performance car.... use the best
premium gas u can find...

for CA people like myself... we could only do 91 at best..
JT-KGY is offline  
Old 03-26-2003, 02:02 AM   #3
P2x
Scooby Newbie
 
Member#: 6016
Join Date: Apr 2001
Location: Cali
Vehicle:
MY05 Toyota Prius
Silver

Default

Quote:
Originally posted by JT-KGY
It's a turbo charged high performance car.... use the best
premium gas u can find...

for CA people like myself... we could only do 91 at best..
But aren't those ratings the guaranteed minimum? Presumably some brands of gas may have an octane rating that's higher than others..

Of course, I may just be talking out my ass..
P2x is offline  
Old 03-26-2003, 03:30 AM   #4
subarud
Gone.. But not forgotten
 
Member#: 9863
Join Date: Sep 2001
Location: Mendacity, U.S.
Vehicle:
02 WRX Blue & Fast
91 S10 Red & Abused

Default

91 octane is typically the highest octane gas you can find in California. Only at select pumps which are pretty rare (Maybe in big cities and at the racetracks) 87, 89, and 91 are the only octanes available. Not only do we have the most expensive gas in the country but also the worst octane rating. But we do have some nice mountain roads.

If there were any higher octane gas available, believe me, I would be filling up the scoob with it and cranking up the boost

~Evan
subarud is offline  
Old 03-26-2003, 07:20 AM   #5
Turboy
Scooby Newbie
 
Member#: 5933
Join Date: Apr 2001
Location: Fairfax, VA
Vehicle:
2004 WRX STi
Java Black Pearl

Default

I'll be going with Sunoco 94 octane.
Turboy is offline  
Old 03-26-2003, 09:15 AM   #6
ANZAC_1915
Moderator
 
Member#: 456
Join Date: Oct 1999
Chapter/Region: NWIC
Location: Redmond, WA, USA
Vehicle:
2008 Forester XT
Steel Gray Metallic

Default

And your car will make 300 BHP on Sunoco 94.

Someone needs to dyno an STi on 94 and 91 and see what the power loss is.
ANZAC_1915 is offline  
Old 03-26-2003, 10:19 AM   #7
skuttledude
Scooby Specialist
 
Member#: 738
Join Date: Jan 2000
Chapter/Region: MWSOC
Location: Southern Ohio USA
Vehicle:
2008 Lexus IS-F
Ducati Monster 800

Default

Agreed- (G. Wallace) It would be interesting to see the difference between the two octanes.

Of course there is the debate on which company fuel is better? (chevron, Texaco, 76, Sunoco etc...) I really don't know if there is a non-biased site that has data on better fuels.

Last summer, people (incl friends and relatives) were having fuel pumps going bad on their cars here in the southern Ohio area. It was blamed on bad fuel at the refinnery in Kentucky. The deal was that you pay for the fuel pump to be replaced and the refinnery will send you a check, which they did after about 6 weeks.

Of interesting note was that the blame was not going on the local BP, chevron, marathon gas stations, but on the refinnery itself. The answer to this was that all the gas produced for our cars in this region comes from the same KY refinnery and that there is bascially no difference between fuels. (BTW, we do not have a Suncco station here in this area)

I was a little shocked to hear that there is little difference at all between brands of fuel. I usually get my gas from the same station each week due to its high quality (they change their filters often, of which you can see) and good price. In the past, I've always thought that gas station "X" had better quality gas than gas station "XX".

Anybody want to shed some light on gas quality? Has anyone heard about the same gas used by different gas stations?

Davis
skuttledude is offline  
Old 03-26-2003, 10:25 AM   #8
cboggess
Scooby Specialist
 
Member#: 30804
Join Date: Dec 2002
Chapter/Region: SWIC
Vehicle:
87 Yugo
Red

Default

I recently saw on TV or read somthing about the oil refining process. yes it is true that a number of different companies use the same refinery, but once they have the gas it's the additives they add to it after refining that make up the differences in brands.
cboggess is offline  
Old 03-26-2003, 10:49 AM   #9
rally_wannabe
Scooby Specialist
 
Member#: 15799
Join Date: Feb 2002
Chapter/Region: MAIC
Location: Arlington, VA
Vehicle:
'02 WRX/'06 EVO IX
Vshnu-DPS Stg2/CBRD 405HP

Default

I talked to someone who worked at a refinery and he said all gas is the same.

the different brand's trucks all pulled up to the same pump.

do you think those trucks insert additives on the way to the gas station? or unload, insert additives and reload and then go to the gas station?

I seriously doubt it.
rally_wannabe is offline  
Old 03-26-2003, 11:00 AM   #10
Corn-Picker
Scooby Specialist
 
Member#: 8679
Join Date: Jul 2001
Location: Morgantown, WV
Vehicle:
2010 The most hated
vehicle on the internets

Default

Quote:
Originally posted by Glenn Wallace
And your car will make 300 BHP on Sunoco 94.

Someone needs to dyno an STi on 94 and 91 and see what the power loss is.
I would guess we wouldn't see much loss due to the higher displacement of the STi over something like the Evolution. A standard WRX is ~113 HP/liter. The STi is 120HP/liter if the numbers Subaru has given are true.
Corn-Picker is offline  
Old 03-26-2003, 12:47 PM   #11
STi INGER
Scooby Newbie
 
Member#: 33468
Join Date: Feb 2003
Location: Portland, OR
Vehicle:
2004 WRX STi (soon)
Black

Default

Quote:
Originally posted by rally_wannabe
I talked to someone who worked at a refinery and he said all gas is the same.

the different brand's trucks all pulled up to the same pump.

do you think those trucks insert additives on the way to the gas station? or unload, insert additives and reload and then go to the gas station?

I seriously doubt it.
I have heard that gas stations add stuff to the gas at the station itself, not the tanker truck.
STi INGER is offline  
Old 03-26-2003, 01:44 PM   #12
skuttledude
Scooby Specialist
 
Member#: 738
Join Date: Jan 2000
Chapter/Region: MWSOC
Location: Southern Ohio USA
Vehicle:
2008 Lexus IS-F
Ducati Monster 800

Default

Quote:
Originally posted by STi INGER


I have heard that gas stations add stuff to the gas at the station itself, not the tanker truck.
And I've heard that the tanker actually does the additive. However, I would like to know for sure. Hopefully there is someone "here" that can give us the low down.

Davis
skuttledude is offline  
Old 03-26-2003, 02:32 PM   #13
somebody else
Scooby Specialist
 
Member#: 21618
Join Date: Jul 2002
Chapter/Region: SCIC
Location: southern California
Thumbs up

Add a couple gallons of 100 octane to a tank of California piss (91 octane) and good things happen. There are a couple stations close by my house that sell 100 octane unleaded at the pump @ $4.00 or more / gallon. The Union 76 site has mixing charts that show the effective octane from mixing 91 and 100 together.

This works on the WRX and I bet it works on the STi too.

--scott
somebody else is online now  
Old 03-26-2003, 03:07 PM   #14
HFTuRbo
Scooby Newbie
 
Member#: 34388
Join Date: Mar 2003
Location: Lehigh Valley, PA
Vehicle:
04 WRX STi
Black w/gunmetal

Arrow

Just some "seat-of-the-pants" input... The WRX seems to get better mileage running on Sunoco Ultra and may even run cooler. Another important tip is to never pump gas into the car if there is a tanker truck filling the station; it stirs up all kinds of dirt from the bottom of the tank.
HFTuRbo is offline  
Old 03-26-2003, 06:25 PM   #15
spburns74
Scooby Newbie
 
Member#: 24608
Join Date: Sep 2002
Location: NH
Default

93 oct or higher is always available in NH. I too try to stick with one gas brand. I find I use Mobile, but that may also be because I use Mobile 1 synthetic motor oil in my Superhawk (special motorcyle oil) and my last 2 Imprezas. I haven't run into having any bad tanks of gas like I have from those corner store gas stations. Keeping mobile going strong.
spburns74 is offline  
Old 03-26-2003, 06:26 PM   #16
spburns74
Scooby Newbie
 
Member#: 24608
Join Date: Sep 2002
Location: NH
Default

.

Last edited by spburns74; 03-26-2003 at 09:01 PM.
spburns74 is offline  
Old 03-26-2003, 06:26 PM   #17
spburns74
Scooby Newbie
 
Member#: 24608
Join Date: Sep 2002
Location: NH
Default


Last edited by spburns74; 03-26-2003 at 09:01 PM.
spburns74 is offline  
Old 03-27-2003, 03:42 PM   #18
banghado
Scooby Newbie
 
Member#: 33152
Join Date: Feb 2003
Location: Roanoke VA
Default

Would running 88 or 89 Octane do any damage to the car? If I am just puttering around downtown or stuck on the interstate doing 72MPH in a straight line for 9 hours, I'd probably rather not blow the big bucks on the expensive gas.......
banghado is offline  
Old 03-27-2003, 03:46 PM   #19
JT-KGY
Scooby Specialist
 
Member#: 7852
Join Date: Jun 2001
Location: Alhambra, CA
Vehicle:
03 White Lan EVO 8
97 Techno-Violet BMW M3/2

Default

Quote:
Originally posted by banghado
Would running 88 or 89 Octane do any damage to the car? If I am just puttering around downtown or stuck on the interstate doing 72MPH in a straight line for 9 hours, I'd probably rather not blow the big bucks on the expensive gas.......

dont get this... why dont you save even more money and get the
2.5RS??? since using 88 or 89... you'll probably get that same
amount of hp...
JT-KGY is offline  
Old 03-27-2003, 06:37 PM   #20
spburns74
Scooby Newbie
 
Member#: 24608
Join Date: Sep 2002
Location: NH
Default

Are you trying to encourage detination????????? What are you going to save, $2.00 per fill up by putting in that junk (88-89 oct). If you need to save that much money, than why.....never mind. Silly question anyways.
spburns74 is offline  
Old 03-27-2003, 08:13 PM   #21
somebody else
Scooby Specialist
 
Member#: 21618
Join Date: Jul 2002
Chapter/Region: SCIC
Location: southern California
Default

Hey! Why even bother with pricey 87 octane?

Just piss into the tank; you'll do just fine.

- - -

When the ECU senses detonation it takes more or less drastic measures to prevent the engine from blowing up. The three biggest measures are richening up the fuel/air mixture, turning down the turbo boost, and retarding the ignition timing. These actions work to (a) decrease your mileage and (b) decrease your performance. When it's all said and done, the money you saved on fuel prices will be eaten up in reduced gas mileage. I would call that "breaking even" except -- remember -- you gave up a ton of performance.

--scott
somebody else is online now  
Old 03-28-2003, 12:32 AM   #22
Chuck Annicelli
Scooby Specialist
 
Member#: 3265
Join Date: Dec 2000
Chapter/Region: NESIC
Location: Clinton, CT
Vehicle:
2013 WRX Hatch ISM
2013 Outback Limited

Default

I mix all my own gas by hand. I use 33% sunoco 94 then 33% 87 octane then 33% Tap water. and 1% Dry gas. The dry gas is to help get rid of some of the water. The water saves you a ton on gas money. Generally the car will not start so I burn almost no gas.

Haha,

Not pointing fingers at anyone.

Cheers,

Chuck
Chuck Annicelli is offline  
Old 03-28-2003, 12:34 AM   #23
Chuck Annicelli
Scooby Specialist
 
Member#: 3265
Join Date: Dec 2000
Chapter/Region: NESIC
Location: Clinton, CT
Vehicle:
2013 WRX Hatch ISM
2013 Outback Limited

Default

I mix all my own gas by hand. I use 33% sunoco 94 then 33% 87 octane then 33% Tap water. and 1% Dry gas. The dry gas is to help get rid of some of the water. The water saves you a ton on gas money. Generally the car will not start so I burn almost no gas.

Haha,

Not pointing fingers at anyone.

Cheers,

Chuck
Chuck Annicelli is offline  
Old 03-28-2003, 12:34 AM   #24
Chuck Annicelli
Scooby Specialist
 
Member#: 3265
Join Date: Dec 2000
Chapter/Region: NESIC
Location: Clinton, CT
Vehicle:
2013 WRX Hatch ISM
2013 Outback Limited

Default

I mix all my own gas by hand. I use 33% sunoco 94 then 33% 87 octane then 33% Tap water. and 1% Dry gas. The dry gas is to help get rid of some of the water. The water saves you a ton on gas money. Generally the car will not start so I burn almost no gas.

Haha,

Not pointing fingers at anyone.

Cheers,

Chuck
Chuck Annicelli is offline  
Old 03-28-2003, 08:09 AM   #25
banghado
Scooby Newbie
 
Member#: 33152
Join Date: Feb 2003
Location: Roanoke VA
Default

Thanks for the responses. I did not know that using lower octane gas could damage an engine or decrease mileage enough to offset the cost savings from the cheaper gas. This board is very informative.....
banghado is offline  
 

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
What Fluids would you recoment to use in 07 sti swap slava from goshen Service & Maintenance 15 06-16-2009 03:14 PM
What Seats To Use In A Daily Driver Sti? intpostman23 Interior & Exterior Modification 26 06-11-2007 05:39 AM
Failsafe reverts to "wastegate pressure," so what spring to use in my ext. wastegate? Wrinkleboi Water/Methanol Injection, Nitrous & Intercooler Cooling 11 07-09-2006 08:29 AM
Now What Gas to use? worx Tri-State Area Forum 42 05-04-2006 07:14 PM
2.0 WRX, What gas to use? colombo140 Factory 2.0L Turbo Powertrain (EJ Series Factory 2.0L Turbo) 24 10-14-2005 12:17 AM


All times are GMT -4. The time now is 11:17 AM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2014 Axivo Inc.
Copyright ©1999 - 2014, North American Subaru Impreza Owners Club, Inc.