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91 or 89 octane?

Discussion in '3rd Gen. Tacomas (2016+)' started by chucknris, Jul 29, 2018.

  1. Jul 29, 2018 at 7:52 PM
    #21
    mds08

    mds08 Well-Known Member

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    Notice a difference? I can tell you mine runs smoother and the gas mileage is better. I can 87 in it the first few times. I think I will stick to the 93. It's not breaking the bank.
     
  2. Jul 29, 2018 at 7:59 PM
    #22
    Beemaster

    Beemaster Well-Known Member

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    87 because the manual says so and I’m happy to oblige since California gas prices are ridonkadonk.
     
  3. Jul 30, 2018 at 1:24 AM
    #23
    Stephenph

    Stephenph New Member

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    In Phoenix I was able to reliably get 87, moved to Idaho and most places serve up 85 or 91... I lost about 2-3 mpg but am not sure if it is quality of gas, lower octane, or altitude
     
  4. Jul 30, 2018 at 2:14 AM
    #24
    Dishsoap

    Dishsoap Active Member

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    $2.73 for 87 here. Man gas is crazy expensive out west
     
  5. Jul 30, 2018 at 6:36 AM
    #25
    GWOT

    GWOT New Member

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    My personal opinion is that higher octane gas is "cleaner", less carbon, burns more complete and stuff, and because I can afford the highest octane. Since the Taco isn't advertised to utilize higher octane it shouldn't make a difference, and using its recommended 87 isn't going to knock.

    holy you Americans have cheap gas... 87 in Canada, Ontario costs $6.63USD/gallon, and I get 94 for $8.10 for my daily Subaru
     
  6. Jul 30, 2018 at 7:34 AM
    #26
    NoDak

    NoDak Well-Known Member

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    ND gas is horrible. use 87 /w ethanol and it sucks for mpg. once you leave the state using the same octane gas I get 2-3 mpg better.

    everyone knows that lives in the state the gas quality sucks
     
  7. Aug 10, 2018 at 5:49 AM
    #27
    chucknris

    chucknris [OP] Member

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    Update, just went for a road trip in the Canadian Rockes, Banff/Jasper area. While driving up there, averaged around 25.4 on the computer with 92, all highway miles except parking and off/on ramps.
     
  8. Aug 10, 2018 at 6:37 AM
    #28
    Gator352

    Gator352 I like Publix cake ...

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    I subscribe to Consumer Reports and they say running higher octane fuel in a vehicle that only requires 87 is a waste of money as the software adjusts making it null and void. Some vehicles require it as the engine is tuned specifically to 91 and up and takes advantage of it.

    They also said the Tacoma sucks unless your a contractor or landscaper. I still gave them the finger and bought one. They gave the Chevy Colorado high marks and while I found the interior to be better, getting anything into the bed you need a step ladder and pulley system! Lol

    Go with what you feel comfortable with. Can afford the 92/3? Why not? It’s not going to hurt it! Can’t afford it? Oh well, truck runs great with 87.
     
  9. Aug 10, 2018 at 7:14 AM
    #29
    greengs

    greengs Well-Known Member

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    Engineering explained YT channel did a pretty decent test on fuel in a variety of cars. He found no to minimal difference in NA cars and slight difference in turbo cars using 91 vs 87.

    Best video on this subject I've seen:

     
  10. Aug 10, 2018 at 7:15 AM
    #30
    greengs

    greengs Well-Known Member

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    Forgot to mention. Mazda cars have compression ratio of 13.0 and have 87 as recommended fuel.
     
    chucknris [OP] likes this.
  11. Aug 10, 2018 at 7:20 AM
    #31
    ddettamanti

    ddettamanti Well-Known Member

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    Higher octane gas does not burn more clean or completely the higher the octane rating the more compression the fuel can withstand before igniting. Your vehicles octane needs are based on the compression ratio of your engine. Your vehicle can adjust timing to compensate either direction, if you’re experiencing a knocking then you should use a higher octane.

    It would be more important to buy quality or “top tier” fuel than buy shitty quality fuel with a 91 octane rating.
     
  12. Aug 10, 2018 at 7:33 AM
    #32
    strictlys

    strictlys Well-Known Member

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    I use only 91, but live in california where we have bad gas. I used 91 since it was purchase with 3 miles on it. I did use a tank of 87 before, but didn't really notice a difference. Now I have the OVtune so its a requirement now. I say save your money and use 87. Gas mileage didn't really make a huge difference before the tune either, but now it flys with 91 with the tune.
     
    chucknris [OP] likes this.
  13. Aug 10, 2018 at 9:44 AM
    #33
    chucknris

    chucknris [OP] Member

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    That’s crazy. I’m sure things have come a long way- suspect better combustion chamber design, etc.
     
  14. Aug 10, 2018 at 9:49 AM
    #34
    chucknris

    chucknris [OP] Member

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    Cool, I’ll take a look at the OVtune, just scraping the surface of the aftermarket. Does seem underpowered, feel like it could use a little grunt.
     
  15. Aug 10, 2018 at 3:50 PM
    #35
    strictlys

    strictlys Well-Known Member

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    I had the OVtune since they started and it does feel a lot better then stock. The transmission is keeping up and the throttle responses is much better.
     
    chucknris [OP] likes this.
  16. Aug 10, 2018 at 7:50 PM
    #36
    Lt. Dangle

    Lt. Dangle Well-Known Member

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    Half tank of gas
    I run 93 as 87 causes my truck to miss horribly. 93 is nice and smooth.
     

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