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Say What...Octane?

Discussion in '1st Gen. Tacomas (1995-2004)' started by Tacoguy, Oct 28, 2009.

  1. Oct 28, 2009 at 7:26 PM
    #1
    Tacoguy

    Tacoguy [OP] Well-Known Member

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    I remember reading a topic some time ago about what Octane people used. It seemed most used 87 octane like me.

    However, as I was reading through the service manual for my 03 tacoma v6, I saw that the RON was 91+ which made me think, does my truck require 91+ octane?

    Here is the source:

    http://www.ncttora.com/fsm/2003/New_Features_Manual/taco2/5vzfeeng.pdf
     
  2. Oct 28, 2009 at 7:38 PM
    #2
    Janster

    Janster Old & Forgetful

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    Not sure what *Research Octane Number* means....

    Did you look in your owners manual?

    Use the Search feature in the blue bar (upper right) and look for other topics on this. 87 works just fine.
     
  3. Oct 28, 2009 at 7:39 PM
    #3
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    Research octain is a world wide value. The octain on the pump (in the USA) is the AKI, or Anti-Knock Index . A RON octain of 91 is an 87 octain at the pump.
     
  4. Oct 28, 2009 at 7:40 PM
    #4
    Tacoguy

    Tacoguy [OP] Well-Known Member

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    Research Octane Number = RON

    Which is something that I often see on gas pumps, not sure what it is. lol
     
  5. Oct 28, 2009 at 7:42 PM
    #5
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    If you see it on pumps, you are probably seeing RdON, or Road Octain Number. Also know as (R+M)/2.
     
  6. Oct 29, 2009 at 3:45 AM
    #6
    dustinuhls

    dustinuhls Well-Known Member

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    Is your truck super-charged? If not, use 87 octane. You're not gonna see a difference using premium except in your wallet.
     
  7. Oct 29, 2009 at 4:01 AM
    #7
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    On the 1GR you will....87 is rated at 236 hp and 266 torque, while when running 91, its rated at 239 hp, 278 tq.
     
  8. Oct 29, 2009 at 7:29 AM
    #8
    L8ight

    L8ight Active Member

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    Higher octane pushes back the flash point, and just allows the engine's timing to advance without knocking. That's why forced induction engines tend to like higher octane.
     
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