Gas & Elevation - Mercedes-Benz Forum

 
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post #1 of 4 (permalink) Old 12-14-2005, 05:05 PM Thread Starter
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Date registered: Oct 2005
Vehicle: 1987 190E 2.3-16
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Gas & Elevation

Hey just want to know what kind of gas you guys use in the higher elevation area such as Denver? Especially for an pre-1991 merc.[8D][8D][8D]
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post #2 of 4 (permalink) Old 12-14-2005, 05:24 PM
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RE: Gas & Elevation

Well we used 93 octane in Colorado Springs, 93 in Goldsboro, NC and 93 octane in Boone, NC.
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post #3 of 4 (permalink) Old 12-14-2005, 06:08 PM
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RE: Gas & Elevation

Hi, Fission.

My old stomping grounds. (sigh) I do miss CO.

I would recommend using the octane specification from your owners' manual regardless of altitude, particularly so for an older car.

While altitude does effectively decrease the potential octane requirements for some engines (which is why in Colorado, Wyoming and SLC they have 85 octane regular) you'll note that the premium grades are still 91 or 93 octane. That's because some engines are designed for a specific octane requirement, and bumping it down based on altitude is not recommended. Besides, assuming the correlation would work and you could bump 93 to 91 or 91 to 89, then you're only saving a dime a gallon or so; it's not as though you could drop to the 85 octane stuff.

My recommendation would thus be not to risk it and stick with what the folks that designed your premium car recommend.

Take care and enjoy the ride -- at any altitude. [:)]
Greg
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post #4 of 4 (permalink) Old 12-21-2005, 03:39 PM
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RE: Gas & Elevation

WE USE 97 OCTANE in the united kingdom.
u got to love it.
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