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Old 01-04-2004, 01:45 PM   #1
Scooby43055
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Member#: 6029
Join Date: Apr 2001
Chapter/Region: MWSOC
Location: Dublin, Ohio, USA
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06&8 STI
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Question high altitude fuel requirments for XT

Im hoping to get some help from you guys up in the mountains. I have a customer who is moving there in a few months and is worried about fuel availability and requirments. The Forester XT recomends 91AKI, however he has found that this fuel isnt always available in the higher altitudes. What kind of fuel do you guys run in your turbo cars? Thanks for your help
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Old 01-04-2004, 01:51 PM   #2
Matt Monson
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Chapter/Region: RMIC
Location: Teh Ghetto Garage, CO
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At least anywhere I have ever been in Colorado and Utah you can get 91. There are plenty of STi's and XT's running around here, not to mention butt loads of WRX's...
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Old 01-04-2004, 02:25 PM   #3
alfaguy
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Location: Lafayette, CO
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Yeah, 91 octane is readily available. It's the 92-94 octane avialable East of the Mississippi that isn't common out here.
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Old 01-04-2004, 05:22 PM   #4
hotrod
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Join Date: Jan 2002
Location: 13.239@102.85 @ 5800 ft on 13T
Vehicle:
2002 Impreza WRX
e85forum.net

Default Not a problem

Tell your client not to worry, 91 octane is available everywhere here in Colorado. I've lived up here all my life and been in every county of the state many times. Driven over 500 thousand miles up here.

Also keep in mind that due to the higher altitude the engines octane requirement is less due to lower cylinder pressures.

Many of us run 16 -17 psi on 91 octane pump fuel with no problems. (atmospheric pressure up here is about 12.2 - 11.8 psi due to altitude, so your actual manifold pressure will be lower than at sea level).

Not until you start running 17+psi boost do you need to start running higher octane fuels.

Larry
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Old 01-05-2004, 12:29 AM   #5
danswrx
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I've seen 91 octane at every station I've seen in CO. Also my wrx seems to do just great going from 5200 feet to 11200 feet in about an hour or so. The ecu works well, and the turbo is a big help getting up the mountain. A good choice.
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Old 01-05-2004, 02:55 AM   #6
AV630
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yup EVERY reputable gas station has 91...... ive never seen one without it.
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