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Gas Octane

Discussion in '2nd Gen. Tacomas (2005-2015)' started by BreezyTaco, May 9, 2009.

?

Which fuel octane do you use?

  1. 87

    2,148 vote(s)
    64.6%
  2. 89

    449 vote(s)
    13.5%
  3. 91

    764 vote(s)
    23.0%
  4. Other fuel additives

    55 vote(s)
    1.7%
  1. Apr 22, 2013 at 5:56 AM
    #881
    Creemore

    Creemore Well-Known Member

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    Just swapped the Taco for a Tundra Crewmax Platinum, so I'm obviously too stupid to worry about mileage, but I thought this would be a useful bit of data for the conversation.

    My Tacoma ran exclusively on ethanol-free premium. Over just short of 40,000 miles in the three years I used the Road Trip app, it averaged 19.5 miles to the US gallon (better in summer, worse in winter).

    FWIW. Enjoy your trucks, lads.
     
  2. Apr 25, 2013 at 12:54 PM
    #882
    2013TuRD

    2013TuRD Well-Known Member

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    87 for the Taco
    91 for the Gixxer 750
    94 for the Turbo Miata

    In all cases the lowest octane that results in no detonation. Knocking is the sound of parts in your engine trying to get out.
     
  3. Apr 25, 2013 at 1:03 PM
    #883
    BnbBlitz

    BnbBlitz Well-Known Member

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    premium all day
     
  4. May 6, 2013 at 4:48 PM
    #884
    peiscooter

    peiscooter Well-Known Member

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    No difference in mpg between 91 & 87 observed here.
     
  5. May 6, 2013 at 7:19 PM
    #885
    mullet

    mullet Member

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    Non ethanol 91
     
  6. May 6, 2013 at 8:07 PM
    #886
    jrubicon

    jrubicon Active Member

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    im one of the few running 89. its the reasonable compromise between 87 and 91.
     
  7. May 6, 2013 at 10:27 PM
    #887
    Buck717

    Buck717 Well-Known Member

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    Anything above 87 is a waste unless you have the supercharger, or you raised your compression somehow. High octane is for high compression engines. Your owners manual wouldn't lead you wrong. Though you're not hurting anything by running a higher octane either, so if you have money to burn (pun intended) have at it.
     
  8. May 7, 2013 at 4:26 AM
    #888
    fireroad

    fireroad Well-Known Member

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    I work at 3800 ft, live at exactly 6000 ft. All out gas stations are 86/88/91. All the science says you are supposed to need less octane at higher elevations...but my baby just don't like the 86. I run 88 in town and average 17 high, mid 18s. I run premium on long road trips as the speed limit out here is 75 and I average just over 21 (barely high 19s on 88).
     
  9. May 7, 2013 at 4:30 AM
    #889
    romeo

    romeo Wombat

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    i run 91/93, i think its best for my truck and it responds well with it. i put race gas in a few times just to see if it did anything and did see an increase in mileage but it wasnt worth the extra money spent.
     
  10. May 7, 2013 at 4:53 PM
    #890
    graywolf2011

    graywolf2011 Well-Known Member

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    I run regular(87) in winter and premium(91) in summer. If I run regular in summer, I get "rattling" slight predetonation on level, no acceleration driving:mad:. Weird, I know:rolleyes: With everything being computerized, they cannot adjust anything anymore:(
     
  11. May 7, 2013 at 7:39 PM
    #891
    RearViewMirror

    RearViewMirror Saw things so much clearer once you... were in my

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    I run Shell V-Power 93 exclusively. It makes me feel better and as long as I can afford it I'll keep doing it. It might not make a "huge" difference but it isn't going to hurt the engine.

    Didn't read the entire thread so if this was posted before I apologize in advance.

     
  12. May 7, 2013 at 8:33 PM
    #892
    DannyD

    DannyD Well-Known Member

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    He probably lives somewhere like I do, vancouver BC. I typically go to chevron. The lower octanes are grouped togethor, that states up to 10 ethanol right beside the handle. Then 91 is by itself and ses no ethanol.

    I ran the first 14,000km of my truck on 87 with 10% ethanol. After reading this thread I`m goona switch to the 91 ethanol free and see what it does.
     
  13. May 8, 2013 at 4:00 AM
    #893
    kingston73

    kingston73 Well-Known Member

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    Just make sure you really do have ethanol free 91 before you pay for it. The octane rating and ethanol content have zero to do with each other.
     
  14. May 8, 2013 at 4:20 AM
    #894
    bldegle2

    bldegle2 OldPhart

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    Ethanol does bad things to gas lines on older cars....and now they are trying to up the percentage from 10% to 15%...

    If you were to run on pure ethanol, you gas mileage would plummet...so, now they are going to force 15% stuff on us, meaning LESS mpg...somehow this all doesn't make any sense except for corn farmers...

    Bleh..

    I run the 87 stuff most of the time, higher octane at higher elevations though...
     
  15. May 8, 2013 at 8:20 PM
    #895
    mullet

    mullet Member

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    +1 this is why in FL have Non-Ethanol stations down here for boats. It reeks havoc on boats down here.
     
  16. May 12, 2013 at 12:14 PM
    #896
    JW87

    JW87 Well-Known Member

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    93 is the only gas I've ever put in it. Dont know how other octanes perform.
     
  17. May 12, 2013 at 1:09 PM
    #897
    13Greysled

    13Greysled Well-Known Member

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    89 is all I use in any of my vehicles. Happy medium between cheap and premium.
     
  18. May 12, 2013 at 1:33 PM
    #898
    KenLyns

    KenLyns Lord of War

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    Page 395 of 2006 owner's manual:
    http://www.toyota.com/t3Portal/document/om/OM35858U/xhtml/OM35858U_OM0019.html?locale=en

     
    Last edited: May 12, 2013
  19. May 12, 2013 at 2:12 PM
    #899
    CINER

    CINER Active Member

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    My truck pings on accel when air conditioning is on when running 87 or 89, went to 91, all better.....will always run 91 in this truck now......
     
  20. May 12, 2013 at 4:32 PM
    #900
    El Chip

    El Chip Well-Known Member

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    Just FYI.

    Page 74 of the 2010 US Owners manual states:

    Fuel types:
    Use unleaded gasoline. (Octane Rating 87 [Research Octane Number 91] or
    higher)

    Page 483:

    Toyota allows the use of oxygenate blended gasoline where the
    oxygenate content is up to 10% ethanol or 15% MTBE.
     
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