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Fuel Type (Premium 91 - regular 87) of the tacoma, please help from experts???

Discussion in '1st Gen. Tacomas (1995-2004)' started by aoooz, Apr 8, 2012.

  1. Apr 8, 2012 at 1:25 AM
    #1
    aoooz

    aoooz [OP] Member

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    texas-denton
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    Hello my friends

    I am a new member and hope to be active here in this wonderful forum

    I want to ask about the type of fuel?? My car is

    Toyota tacoma 4 cyl (2.7) (Carburetor)

    I have a question important to me?

    What type of fuel that is supposed to be used (unfortunately I lost the owner's manual) I use these days, 91 Premium (previously I was using regular 87 but my friend advised me to switch to 91 Premium I do not know why he says it's prolongs engine life is longer with 91???
    And performance be better????

    Frankly did not

    Notice an improvement in performance

    The engine compression ratio is (9.5)


    So please what am I supposed to use (91 Premium

    Or 87 regular)

    my brother took my car and he put the 87 fuel !!??( in side the trunk was a 91 !!!!! ) it's be come mixed !!!!

    Is the fuel mix (87 and 91) harms the car??

    pleeeeeeas ! Please I am in the most puzzling ????

    thanks in advance for help me
     
  2. Apr 8, 2012 at 2:51 AM
    #2
    aoooz

    aoooz [OP] Member

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    thank you very much !! you relaxed me ??

    OK I'll do what you told me I think i well come back to 87 ??

    But what should I do (I mean convert between 91 to 87) Is there a right way to do that??? Without damage??

    thank you Again Sir !
     
  3. Apr 8, 2012 at 3:27 AM
    #3
    Killer

    Killer Well-Known Member

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    I would run 87 octane in that truck from now on. You are not going to gain anything by running higher octane.

    As for mixing octane levels of 87 octane and 91 octane, the fuel manufactures do this all the time and they call it 89 octane. So don't worry about mixing the octane levels.
     
  4. Apr 8, 2012 at 4:50 AM
    #4
    aoooz

    aoooz [OP] Member

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    thank you killer ) nice nakename(

    you relaxed me too ! I was worried that the engine harmed

    thank you guys all of you

    Have nice day
     
  5. Apr 8, 2012 at 8:12 AM
    #5
    Madjik_Man

    Madjik_Man The Rembrandt of Rattle Can

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    Running 91 will do absolutely nothing for your truck in terms of performance or longevity/durability.

    If anything, it might hurt your mpg.

    Run 87 and you're golden
     
  6. Apr 8, 2012 at 8:29 AM
    #6
    David K

    David K Well-Known Member

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    Mixing the two (91 and 87) just makes it 89! (if 50-50)

    I had have 3 tacomas 2001-2010 models, and they were all V-6's... and used 87 both here and in Mexico... with no problem (All 3 were recommended 87 in their owner's manuals, too).

    Higher octane gasoline is just one with a lower detonation, for higher compression engines that would 'ping' with excelleration, on Regular grade gas (87). This was back 'in the day' before electronic ignition and ecu controlled motors.

    I believe the newer engines have automatic anti-ping (knock) systems... so you can use the lowerst octane recommended (87)... and putting higher priced gas has no affect accept on lowering the money in you wallet, faster.
     
  7. Apr 8, 2012 at 9:35 AM
    #7
    aoooz

    aoooz [OP] Member

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    Madjik_Man

    David K

    Thanks for the advice

    So no problem With performance when using the regular 87
    OK I will start using 87 regular
    But what is supposed to do (I mean there is in the fuel tank 91 Premium) What should I do? Do emptied the tank and then put 87 or Mix together??
     
  8. Apr 8, 2012 at 9:40 AM
    #8
    David K

    David K Well-Known Member

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    As I said, if you mix a higher octane with a lower... you will just average the two... No worries... Your truck (or at least the new ones) will automatically adjust timing if it is about to ping (knock), so it won't... But that is only extreme high compression, extreme high temperatures and poor/ low octane quality gas.

    You are fine... The truck will let you know if it isn't happy.
     
  9. Apr 8, 2012 at 9:42 AM
    #9
    Madjik_Man

    Madjik_Man The Rembrandt of Rattle Can

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    Don't worry about it. Go through the tank as you normally would (driving it).
     
  10. Apr 8, 2012 at 11:22 AM
    #10
    TacoMX

    TacoMX TW's Official anti body-lift pundit

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    :confused:
     
  11. Apr 8, 2012 at 11:23 AM
    #11
    worthywads

    worthywads Well-Known Member

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    English second language?
     
  12. Apr 8, 2012 at 11:29 AM
    #12
    TacoMX

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    no...he said its carbureted....Yotas haven't been carbureted since 1984-1987 with the 22R
     
  13. Apr 8, 2012 at 11:54 AM
    #13
    Rich91710

    Rich91710 Well-Known Member

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    Could be an export model.

    All kinds of oddball shit outside of the US.
    Encountered a guy with a '97 Suburban that still had the pre-'96 5.7 TBI engine. The engine and interior parts were a mix of '97 and earlier parts... and it was not a Frankenbuild, he was the original owner and brought the truck with him when he moved here from, IIRC, Panama.
     
  14. Apr 8, 2012 at 2:27 PM
    #14
    Cvd2312

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    Truck was designed for 87. use 87
     
  15. Apr 8, 2012 at 4:53 PM
    #15
    Midnight Drifter

    Midnight Drifter Well-Known Member

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    Why the hell did you convert to carb'd?
     
  16. Apr 8, 2012 at 5:27 PM
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    worthywads

    worthywads Well-Known Member

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    You think someone afraid to mix 87 with 91 converted to a carburetor? Probably has no idea.
     
  17. Apr 8, 2012 at 7:14 PM
    #17
    STLharry

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    I am SOOOO confused! Toyota stopped making carbies back in the 80s. I also checked on wikipedia and the only 2.7L Toyota petrol motor made to that date was the 3RZ-FE, which as we all know, is injected. So I'm not sure how to go about this.

    Maybe if OP clarified?
     
  18. Apr 8, 2012 at 8:19 PM
    #18
    TacoMX

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    I is confused too :confused:
     
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