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Fuel octane levels

Discussion in 'General Automotive' started by NelsonTacoma, Jul 25, 2010.

  1. Jul 25, 2010 at 8:35 PM
    #1
    NelsonTacoma

    NelsonTacoma [OP] This is my derpawayinator!!!!!

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    So, I'm driving through Utah & Wyoming in the wifes 4Runner and I go to this gas station and there's 4 levels of gas, 85, 87, 89, & 91. Does anyone know why they have different levels like this? I've never seen this in AZ before. Of course I didn't choose 85, I went with the usual of 87. Just thought maybe someone on here might know the answer.
     
  2. Jul 25, 2010 at 8:45 PM
    #2
    wtbthree

    wtbthree Give 'er

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    maybe the 85 is due to a larger contingency of people running heavy equipment, larger more rugged engines?? agriculture? hmmm
     
  3. Jan 29, 2012 at 9:20 AM
    #3
    harpolith

    harpolith Well-Known Member

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    i believe the 85 is a 15% ethanol blend. not sure, but i think this to be the case.
     
  4. Jan 29, 2012 at 11:39 PM
    #4
    Alderleet

    Alderleet Ace of Spades

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    Hell, just going through southern idaho, its common to see just 85,87,89.

    I feel bad using 89... Especially when i was pampered using 93, before the dipshits did some behind the scenes handshakes, and claimed "ethanol will reduce foreign oil dependance".
     
  5. Jan 29, 2012 at 11:42 PM
    #5
    harpolith

    harpolith Well-Known Member

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    correction... in south dakota E85 is a 15% ethanol blend.
     
  6. Jan 30, 2012 at 12:04 AM
    #6
    Norton

    Norton Well-Known Member

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    Lower octane fuels are required at higher altitudes. For example, 91 octane is the best gas we can buy in much of Colorado - a far cry from the 93-94 octane fuels I could get in the northeast.
     
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