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05-15-2006, 03:30 PM | #1 |
Drives: civic Join Date: May 2006
Location: CO
Posts: 10
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octane at high altitude.
Hi guys. quick question regarding gasoline octane levels for the us Yaris. Here where I live, the available gasoline octanes are 85, 87, and 91. The manual recommends 87 octane, but I'm assuming that's for sea level. Would running 85 be okay?
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05-15-2006, 04:29 PM | #2 |
Only Happy When it Rains
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Probably. I think at higher altitudes lower octane becomes more potent, or something like that.
Either way, using an octane 2 points lower would make the car a little less peppy and maybe hurt fuel economy a little bit. I doubt it would do any serious damage.
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Colin Chapman disciple |
05-15-2006, 06:01 PM | #3 |
Drives: 2007 Yaris RS Silver Join Date: May 2006
Location: Ottawa Ontario Canada
Posts: 80
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yeah for sure, but if you run high test in it the engine will run slightly better as well as last longer.
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05-15-2006, 06:12 PM | #4 | |
Drives: 95 Integra Join Date: Feb 2006
Location: San Fran, CA
Posts: 58
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Quote:
The Yaris motor requires 87 octane. Putting in 85 octane won't damage the motor; I am pretty sure it has a knock sensor. The motor will have to retard it's timing so that means you will get less performance and perhaps lower fuel economy. |
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05-15-2006, 06:26 PM | #5 | |
Drives: civic Join Date: May 2006
Location: CO
Posts: 10
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Quote:
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05-16-2006, 03:30 AM | #6 | |
Only Happy When it Rains
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Quote:
I do not know if it will increase engine life, but higher octane fuel will give a slight bump in power and fuel economy. The emphasis should be on slight.
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Colin Chapman disciple |
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05-16-2006, 10:48 AM | #7 |
i usually use 91 since here in florida its the middle. we got 87,91, and 93. but hey if i can use 87. it"ll be alot better for me. but on the other hand i get better milage with the higher octane. maybe like 2-3 miles a gallon.
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05-16-2006, 10:55 AM | #8 |
Drives: civic Join Date: May 2006
Location: CO
Posts: 10
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thanks guys... i think I'll be using the middle one... 87 octane. :)
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05-16-2006, 11:22 AM | #9 |
It's all about VVTI
Drives: Yaris 5Dr LE White Join Date: Feb 2006
Location: Canada
Posts: 308
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I believe we had a page about Octane, well, not specifically at high altitude. but I believe that would be helpful also, please check the pages we have posted probably months ago.
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Ziv on Vitz '06. |
05-16-2006, 11:36 AM | #10 |
Speed Wrenchin'
Drives: 2006 Yaris 3 door, Bayou Blue Join Date: Jan 2006
Location: Delta,B.C. Canada
Posts: 96
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Most fuel refiners blend their fuels for specific areas such as high altitudes. They blend to compensate for the decrease in oxygen etc. If you use your local fuel, the 87 octane should work just fine.
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Quench my thirst with gasoline |
05-16-2006, 12:47 PM | #11 |
Drives: S Flint Mica Join Date: May 2006
Location: Virginia
Posts: 209
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If the car says to use 87 octane and you use a higher octane, your are wasting your money. Higher octane does nothing to help.
If your car says to use high test, then use high test as the engine was manufactured to run the higher octane. Kevin |
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