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octane rating?

Discussion in '2nd Gen. Tacomas (2005-2015)' started by chicken lips, Dec 12, 2008.

  1. Dec 12, 2008 at 4:32 PM
    #1
    chicken lips

    chicken lips [OP] Well-Known Member

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    Jose Garcia
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    my owners manual was thrown out before i got my truck, so i been wondering what octane rating does toyota recommend for a 07 v6 4.0 truck?
     
  2. Dec 12, 2008 at 4:33 PM
    #2
    Krazie Sj

    Krazie Sj Resident Jackass

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    Regular 87 octane. It'll give you an 8:1 compression ratio.
    If you want you can use Premium and that'll give you a 10:1 compression.

    So long as you're consistent with what you put in, it'll be fine.

    Personally I run Premium.
     
  3. Dec 12, 2008 at 4:34 PM
    #3
    Tacoma02TRD

    Tacoma02TRD Well-Known Member

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  4. Dec 12, 2008 at 4:34 PM
    #4
    tacoskim

    tacoskim Tuned By Gadget

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    premium for maximum performance... but alot of people are running 87. the tick is less noticeable with premium
     
  5. Dec 12, 2008 at 5:21 PM
    #5
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Staff Member

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    The compression ratio doesnt change when useing a different grade of fuel.
     
  6. Dec 12, 2008 at 5:28 PM
    #6
    Krazie Sj

    Krazie Sj Resident Jackass

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    I just regurgitated what I read on these forums a couple times from various threads. If I've been mislead, I'll shut the hell up and stop misleading other people.
     
  7. Dec 12, 2008 at 5:38 PM
    #7
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Staff Member

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    No need to "shut the hell up", Im just correcting you. :)
     
  8. Dec 12, 2008 at 5:39 PM
    #8
    Krazie Sj

    Krazie Sj Resident Jackass

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    No worries. But if I don't have anything productive to say, I might as well keep quiet.

    Don't suppose you'd know what they were talking about the changing compression rations then hey?
     
  9. Dec 12, 2008 at 6:00 PM
    #9
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Staff Member

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    I havent heard of an engine that has a variable compression ratio in a production gasoline engine. SAAB intoduced one years ago, but I havent heard anything about it since. A variable compression ratio engine is kinda like the "Golden Egg". It can be done, but its very costly and machanically complex.
     
  10. Dec 12, 2008 at 6:02 PM
    #10
    linkfeeney

    linkfeeney Well-Known Member

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    link the stink!
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    man, regular sure is A lot cheaper... hard for me to fill it super when regular is like $1.44 here in NJ. :)
     
  11. Dec 12, 2008 at 6:28 PM
    #11
    Packman73

    Packman73 ^^^^ 3%er ^^^^

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    Dude! Premium used to be over $4/gallon; $1.77 ain't bad at all. I didn't think we'd see under $2/gallon again...
     
  12. Dec 12, 2008 at 6:30 PM
    #12
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Staff Member

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    X2, and being as 91 is $0.20 a gallon more than 87, I found its cheaper to run the 91 as I get better mpg too.
     
  13. Dec 12, 2008 at 6:37 PM
    #13
    linkfeeney

    linkfeeney Well-Known Member

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    i know... i know.. but the gas got so cheap... it just looks so good!!
     
  14. Dec 12, 2008 at 7:22 PM
    #14
    AK27

    AK27 Well-Known Member

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    i have a question for you guys, i run regular fuel for a while and i commute a lot each day. i have noticed that with reg gas my truck runs a hell of a lot rougher (idles rough, not as good gas mileage, more engine noise, etc). however if i run premium, the rough idle disappears, i get a heck of a lot better gas mileage and then engine noises are less noticeable. could i potentially have an engine issue or just keep with the premium?
     
  15. Dec 12, 2008 at 7:24 PM
    #15
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Staff Member

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    Just run the preimium. My owners manual actually says "for best performance use priemium fuel".
     
  16. Dec 12, 2008 at 7:25 PM
    #16
    AK27

    AK27 Well-Known Member

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    thanks chris, i figured so. the difference i get in mileage actually makes it cheaper to buy prem then it does to have to fill up more often with reg.
     
  17. Dec 12, 2008 at 7:28 PM
    #17
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Staff Member

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    thast precisely what I have found. :)
     
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