Altitude + Octane

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Jul 27, 2005 | 07:00 PM

HoldTight

Thread Starter

Member

Joined: Jun 2005

Posts: 91

Altitude + Octane

I am sure this has been beat to death but I have not read it on this forum.

What octane would you recommend for high altitude?

The manual says that you may use unleaded gasoline with an octane rating of 84.
I live in the Denver Colorado area and have been running 87 in my 1998 GXE, it seems to run very smooth as far as I can tell.

What are your thoughts? Is this exceptable or would you still run a 91+ octane?

HoldTight...

Jul 27, 2005 | 07:30 PM

Bobo

Senior Member

Joined: May 2004

Posts: 6,187

I live at sea level on the West Coast of British Columbia. From what I know, I don't think you need to run above 87 octane at your elevation. Surf bobistheoilguy.com and find out what others in your area are using (granted different vehicles but you get the picture).

Aug 4, 2005 | 12:24 AM

SilverMax_04

Senior Member

Joined: Jun 2003

Posts: 1,994

From: Colorado Springs, Colorado

Quote:

Originally Posted by HoldTight

I am sure this has been beat to death but I have not read it on this forum. What octane would you recommend for high altitude?

The manual says that you may use unleaded gasoline with an octane rating of 84. I live in the Denver Colorado area and have been running 87 in my 1998 GXE, it seems to run very smooth as far as I can tell.

What are your thoughts? Is this exceptable or would you still run a 91+ octane?

In Denver (5K feet elevation), 85 Octane Regular should perform comparably to 90 Octane at Sea Level and 87 Octane Mid-Grade should perform comparably to 92 Octane at Sea Level. For more details see my earlier thread on "Octane and What It Means" on this site and go to Post #6 for information about Octane at Altitude:

http://forums.maxima.org/showthread....6&page=1&pp=30