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What Fuel Octane are you using ?

Discussion in '2nd Gen. Tacomas (2005-2015)' started by Rellik01, Jun 15, 2011.

  1. Jun 15, 2011 at 2:23 PM
    #21
    Maticuno

    Maticuno Resident Pine Swine

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  2. Jun 15, 2011 at 2:38 PM
    #22
    BradleyScottETC

    BradleyScottETC Class IV Category 8 Elite VIP Member (Only)

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    Lets write this all out.

    Say you get 20 miles to the gallon.

    So if you fill up when the light goes off, you've got 340 miles per tank.

    So, 17 x $3.43 = $58.31

    $58.31 = 340 miles per tank

    if premium gets you +40mpg

    17 x $3.64 = $61.88 per tank

    So you get 11.7% more miles per gallon for $3.57 more than what you pay for regular. Is that what is being said?
     
  3. Jun 15, 2011 at 2:43 PM
    #23
    BrokenTusk

    BrokenTusk I support a velociraptor free workplace.

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    Check Build Thread!!
    I run 91, because the chip i have installed is programed for 91 Octane
     
  4. Jun 15, 2011 at 2:46 PM
    #24
    mjohn617

    mjohn617 Well-Known Member

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    Haha...not doing it...can't make me!
    The 4.0 runs wide band O2 sensors on left and right banks, this is a pretty high performance engine. It's not just running on a base fuel map and limited feedback.
     
  5. Jun 15, 2011 at 3:09 PM
    #25
    OZ-T

    OZ-T You are going backwards

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    You don't go from 20 MPG to 40 MPG because you use 91 instead of 87
     
  6. Jun 15, 2011 at 3:55 PM
    #26
    BradleyScottETC

    BradleyScottETC Class IV Category 8 Elite VIP Member (Only)

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    I didn't say that, somebody else did. And it's not 20 to 40 MPG, it's 40+ miles per tank.
     
  7. Jun 15, 2011 at 3:59 PM
    #27
    gatlin69

    gatlin69 Retired?

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    I have tried 87 and 85 and saw no difference...so 85 here
     
  8. Jun 15, 2011 at 4:16 PM
    #28
    OffroadToy

    OffroadToy old, forgetful, and decomposing

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    For normal driving I use 87, when towing 91.
     
  9. Jun 15, 2011 at 4:20 PM
    #29
    Irish020

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    89 since the first fill up when I bought mine in 2005.
     
  10. Jun 15, 2011 at 4:24 PM
    #30
    gatlin69

    gatlin69 Retired?

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    I am at a high altitude...6K+ feet...because of the thinner air you can run lower octane with the same results...My GTI called for premium fuel (93 close to sea level-91 here)....The highest you can get is 91..mid grade is 87...the funny thing is it cost the same as 87 closer to sea-level.

    Damn you now you got me thinking about it...lol...any other high altitude drivers thoughts?
     
  11. Jun 15, 2011 at 4:43 PM
    #31
    maineah

    maineah Well-Known Member

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    Less heat energy in high test then there is in 87. I don't run any thing on high test not needed in just about any standard ride complete waste of money. Add super charger/turbo higher fuel rate with a chip and then go up to 91 you'll need it to cool down the egt.
     
  12. Jun 15, 2011 at 7:45 PM
    #32
    mjohn617

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    Haha...not doing it...can't make me!

    Just a heads up, your vehicle is going to need some time to adapt(ECU reset and/or couple tanks of gas). It doesn't know you actually have 91 until it "tests the waters" and re programs timing. But on the other hand you might get some results real quick towing.
     
  13. Jun 15, 2011 at 7:46 PM
    #33
    tacomathom

    tacomathom Well-Known Member

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    It's not new, it's not Mexico
    I use regular (which is 86 octane in the Albuquerque area). I've never tried mid-grade or premium so I can't vouch for higher MPG or increased performance. I doubt these claims as octane is only a measurement of a fuel's anti-knock property.
     
  14. Jun 16, 2011 at 6:06 AM
    #34
    macgyver

    macgyver Well-Known Member

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    The 02 sensors on the 4.0 are not wideband. They are narrowband sensors.
     
  15. Jun 16, 2011 at 6:31 AM
    #35
    chris duby

    chris duby This is where I write something clever

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    I just actually read the owner's manual on mine, and it said it was rated for 87 octane, but Toyota tested it at 91 octane. I'm going to try the 93 octane for a few fill ups and see what happens. I'm pretty sure I'll notice a few more miles out of my tank and not to mention it's better on your engine.
     
  16. Jun 16, 2011 at 6:36 AM
    #36
    solus

    solus HOME!!!

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  17. Jun 16, 2011 at 6:37 AM
    #37
    Lurkin

    Lurkin Well-Known Member

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    Right track, better way to quantify it though is:

    Reg: costs 58.31 for 340 miles, so $0.1715/mile
    Prem: costs 61.88 for 380 miles, so $0.1628/mile

    Cheaper cost/mile to premium.

    FYI, personally I have seen no mpg difference between running 87 and 93, so I run 87.
     
  18. Jun 16, 2011 at 6:37 AM
    #38
    yotamikez

    yotamikez Street glide or die

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    I use the race fuel. Cause every stop light is a quarter mile to me. :cool: bout 118 octane.
     
  19. Jun 16, 2011 at 6:40 AM
    #39
    solus

    solus HOME!!!

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    How the hell is it better on your engine? If the engine was built to run 87 and the ECU can adjust parameters (timing, ignition, etc) to run different octanes than... your claim is completely false. I run 87 because its cheaper and the truck is meant to run on 87.

    Higher Octane gas will run "dirtier" through your engine since you more than likely won't get a complete burn i.e combustion... leaving you with carbon deposits. Until your ECU adjusts to the new fuel and its within its range of parameters

    By your logic than we all should run Race Gas! 118 octane
     
  20. Jun 16, 2011 at 10:14 AM
    #40
    macgyver

    macgyver Well-Known Member

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    I too live my life a 1/4 mile at a time.

    I usually run C16, I hear it's great on cats and 02 sensors.
     

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