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Gas Octane

Discussion in '2nd Gen. Tacomas' started by BreezyTaco, May 9, 2009.

?

Which fuel octane do you use?

  1. 87

    2,147 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. May 10, 2009 at 8:31 PM
    #41
    BreezyTaco

    BreezyTaco [OP] Well-Known Member

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    Besides the gas octane given at the pump, what about other additives? Such as STP Octane boosts, is it for real or a scam? On ebay they sell these little magnet like things that clamp to your fuel hose, and supposedly align the hydrocarbon in the fuel, and thus promotes better mpg...scam or the real deal? When should you get your fuel injectors cleaned as well?
     
  2. May 10, 2009 at 8:33 PM
    #42
    chris4x4

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

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    I dont have a link for it....search on the 1GR-FE engine, and you should find stuff...
    The 1GR-FE is rated at 236 hp on 87 and 239 on 91. Torque is up 12 or so with 91 also.

    See this post:
    http://www.tacomaworld.com/forum/pe...0-87-vs-89-vs-91-octain-fuel-my-findings.html

    Over the summer I have been testing to see the "real world" difference between the 3 grades of fuel. My tests were done on a 155 mile loop from an elevation of 1080 ' up to 5500' and back. Average speed was targeted at 68 mph. Up hills I maintained 80-90. down hills I maintained 70. Temps for all three tests was 105*. Hills ranged from gradual to 6.5%. During this loop, the truck was being pushed pretty good, as anyone in AZ who has driven up north can attest to the amount of hills and twisty roads.

    87 octain yeilded 15.12 m.p.g.
    89 octain yeilded 15.51 m.p.g.
    91 octain yeilded 16.61 m.p.g. *

    *note: On the 91 oct. test, I was loaded with 200 lbs. more stuff than the other 2 tests, and still received better mpg.
     
  3. May 10, 2009 at 8:35 PM
    #43
    chris4x4

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

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    http://en.wikipedia.org/wiki/Toyota_GR_engine

    The 1GR-FE is the 4.0 L version. Bore is 94 mm and stroke is 95 mm. Output is 236 hp (176 kW) at 5200 rpm with 266 lb·ft (361 N·m) of torque at 4000 rpm on 87 octane, and 239 hp (178 kW) at 5200 rpm with 278 lb·ft (377 N·m) at 3700 rpm on 91 octane.
     
  4. May 10, 2009 at 8:37 PM
    #44
    chris4x4

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

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    The magnets are a scam. I never use addatives in my fuel, as the Fuel companies are required to have a minimum amount of cleaners and detergents in the gasoline they sell. All "Top Tier" fuels are good, and what I use, without adding anything else to the tank.
     
  5. May 10, 2009 at 8:42 PM
    #45
    BenJammn5

    BenJammn5 RN

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    Word, I use 91 q time.
     
  6. May 10, 2009 at 10:32 PM
    #46
    Krazie Sj

    Krazie Sj Resident Jackass

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    Exactly why I still run 91 regardless. :)
     
  7. May 10, 2009 at 11:09 PM
    #47
    genxer36

    genxer36 Lord of Tomfoolery

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    I couldn't tell a difference when I tried 91 octane. So I use 87.
     
  8. May 10, 2009 at 11:19 PM
    #48
    genxer36

    genxer36 Lord of Tomfoolery

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  9. May 11, 2009 at 2:28 AM
    #49
    DriverSound

    DriverSound Señor Member

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    On the manual fuel specs, it says "87(research octane number 91)". I'm sure Toyota wouldn't do their spec research with 91 octane if they didn't think it would produce better results.

    I got an average of about 19mpg with 91 octane compared to about 17.5mpg's with 87 octane.
     
  10. May 11, 2009 at 7:34 AM
    #50
    chris4x4

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

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    The ECU will adjust....
     
  11. May 11, 2009 at 7:54 AM
    #51
    geoff5093

    geoff5093 Well-Known Member

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    Mileage varies greatly, when I drive conservatively and don't drive 70+ on the highway I can obtain anywhere from 20-22MPG with 87 octane.
     
  12. May 11, 2009 at 9:04 AM
    #52
    Zombie Runner

    Zombie Runner Are these black helicopters for me?

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    I normall run 87. 89 just seems like a waste...2 higher for 10 more cents a gallon? no thanks. If im gonna spend a little more might as well go with the 91
     
  13. May 11, 2009 at 11:04 AM
    #53
    DriverSound

    DriverSound Señor Member

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    Even at the gas station they try to scam you with the amount of cleaning additives on different octanes but a lot of people don't know that it the fuel only comes out of ONE hose, the amount of cleaning detergent has to be all equal even though they come out of different tanks. I've read a report on this somewhere when I researched ethanol gas. Also in California, I think we only get 87,89,91 and 100 over here and 100 is a rare find and labeled as racing fuel. We don't have 93.

    Here's some good reads on fuels, additives, etc...

    http://www.vettenet.org/octane.html

    http://www.nsxprime.com/FAQ/Miscellaneous/FuelAdditives.htm

    http://dirtbike.off-road.com/dirtbi...ACE-FUE/ArticleStandard/Article/detail/331518
     
  14. May 11, 2009 at 11:19 AM
    #54
    geoff5093

    geoff5093 Well-Known Member

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    +1

    It's usually $0.10 more per gallon to go from 87 to 89, and then another $0.10 to from 89 to 93. Doesn't make much sense to me...
     
  15. May 11, 2009 at 11:23 AM
    #55
    DanGer

    DanGer Avatar approved by 98tacomav6

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    Same, people always ask why I hate ethanol and its funny, i just hate it, can't really explain other than we are causing our fuel consumption to start starving people
     
  16. May 11, 2009 at 11:26 AM
    #56
    WilsonTheDog

    WilsonTheDog Kylie's dad

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    ^I hate it because we get less MPG with it. But yeah, using food for fuel is just plain stupid. We'll starve but we'll sure be able to get around in our vehicles to the empty grocery stores.
     
  17. May 11, 2009 at 11:29 AM
    #57
    DanGer

    DanGer Avatar approved by 98tacomav6

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    See I am too young to even have had the opportunity to test it :(. Had my tacoma for almost a year so It has never been in an area without ethanol
     
  18. May 11, 2009 at 11:46 AM
    #58
    CometKat

    CometKat Well-Known Member

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    Here is why, with a math example

    20 gal tank filled with $2.00, 87 gas = $40
    20 gal tank filled with $2.20, 91 gas = $44

    Mileage = 20mpg with 87
    Mileage = 22mpg with 91

    2mph extra with 91 = 40 extra miles

    40 extra miles is worth $4 of 87 gas

    So it is a wash. 87 costs the same as 91
     
  19. May 11, 2009 at 11:50 AM
    #59
    DanGer

    DanGer Avatar approved by 98tacomav6

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    That is my exact findings (give or take on the mileage). I spend more on fillups, but get better mileage. In the end I get the same price per mile so I just go longer between fillups
     
  20. May 11, 2009 at 12:22 PM
    #60
    GoBlueFan

    GoBlueFan Well-Known Member

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    I think the v6 boys and girls are more prone to varying mpg with different octane than those with the 4-banger.

    Run what the engine needs and designed to be run on. You can only take advantage of the higher octane with a motor designed for it.
     
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