Anybody know of any gas stations in COLORADO with 93+ octane??
Higher elevations don't need that high of an octane.....I think that's what it was.....
There is no reason for high octane in Colorado so it isn't too common for the stations to sell them.
There is no reason for high octane in Colorado so it isn't too common for the stations to sell them.
kevlo911, THANKS!!
I see that there is a station on my way to work =)
It is 93.5 octane but it is like a mom & pop store......what would you say is best: 91 octane from Shell or 93.5 from a small station?
thanks again for all the input!
I see that there is a station on my way to work =)
It is 93.5 octane but it is like a mom & pop store......what would you say is best: 91 octane from Shell or 93.5 from a small station?
thanks again for all the input!
Humble '06 TL Owner
Joined: Nov 2003
Posts: 223
Originally Posted by MaximaPolak
Higher elevations don't need that high of an octane.....I think that's what it was.....
There is no reason for high octane in Colorado so it isn't too common for the stations to sell them.
There is no reason for high octane in Colorado so it isn't too common for the stations to sell them.
We just got shell stations here in colorado about a year ago...they replaced texaco and they cleaned out all their tanks and stuff so I can really tell a difference in their gas but lately I have felt a lil sluggish.....who knows.
Dyno plot says I have the most area under the Administrator curve
Joined: Jul 2001
Posts: 7,064
If I was at high altitiude in Colorado I wouldn't even bother with 93.
High altitude = thinner air = lower cylinder pressures = decreased likelihood of knocking = decreased need for octane level in fuel = it'll probably run at full performance on 89 or whatever they have out there.
If you're not getting knock retard on 89/whatever then going to an even higher octane is not going to help you. Actually, it's more likely that it'll hurt you. So you might be going out of your way for higher octane fuel that you're paying more money for all for your car to possibly perform less with.
It works both ways...
Too little octane = knocking, timing retard, and lost power and efficiency.
Too much octane = poorer combustion effiiciency and poorer combustion rate = ignition timing thrown off and you again lose power and efficiency.
So you need to give engines what they're designed for. At least on my 99, it says right in the manual that in high altitude areas you only need 87 or 89 or so to maintain optimal performance.
High altitude = thinner air = lower cylinder pressures = decreased likelihood of knocking = decreased need for octane level in fuel = it'll probably run at full performance on 89 or whatever they have out there.
If you're not getting knock retard on 89/whatever then going to an even higher octane is not going to help you. Actually, it's more likely that it'll hurt you. So you might be going out of your way for higher octane fuel that you're paying more money for all for your car to possibly perform less with.
It works both ways...
Too little octane = knocking, timing retard, and lost power and efficiency.
Too much octane = poorer combustion effiiciency and poorer combustion rate = ignition timing thrown off and you again lose power and efficiency.
So you need to give engines what they're designed for. At least on my 99, it says right in the manual that in high altitude areas you only need 87 or 89 or so to maintain optimal performance.
Senior Member
Joined: Jul 2003
Posts: 160
Too much octane = poorer combustion effiiciency and poorer combustion rate = ignition timing thrown off and you again lose power and efficiency.
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