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What octane are you running??

Discussion in 'Performance and Tuning' started by 1TUFFTRD, Feb 8, 2010.

  1. Feb 9, 2010 at 1:15 PM
    #21
    jeremiekc

    jeremiekc Well-Known Member

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    Since I live in Germany I am pretty much forced to buy Gas through the Exchange. It is Esso fuel and I have had no problems with it. The lowest that I can buy is 90 so that is what I run. I could go lower but I would have to buy it out on the economy and that just isn't going to happen. On post it is $3.09 a gallon, Off post it is 1.34 Euro a Liter which is equivelant to 4.02 Euro a Gallon or $5.54 a gallon for 87.
     
  2. Feb 9, 2010 at 3:56 PM
    #22
    1TUFFTRD

    1TUFFTRD [OP] WTF

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    out and about building powerlines
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  3. Feb 9, 2010 at 3:59 PM
    #23
    DeeKay21

    DeeKay21 Lieutenant Dan.

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    Whatever mid-grade is out here in NV!!:cool:
     
  4. Feb 9, 2010 at 3:59 PM
    #24
    1TUFFTRD

    1TUFFTRD [OP] WTF

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    awesome info about reseting the ecu! so i run 91 and i changed out my battery two months a go so i should be good!!
     
  5. Feb 9, 2010 at 4:01 PM
    #25
    08TRD Sport

    08TRD Sport ROOTIN AROUND

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  6. Feb 9, 2010 at 4:04 PM
    #26
    Przemekmsu

    Przemekmsu Well-Known Member

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    Shell all the way!!!
     
  7. Feb 9, 2010 at 4:05 PM
    #27
    NAAC3TACO

    NAAC3TACO Well-Known Member

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    I thought that higher octane had an advantage in the 4.0, but did nothing for the 2.7. I know in my 2.7, I noticed zero improvement in performance or fuel economy running higher octane. The 4.0 was originally designed to run high octane, but in 2007 (I may be wrong about the year) they changed the requirement to 87 or higher. Usually in a modern engine that requires high octane, you can run a lower octane at the expense of some performance. Therefore, if you run high octane in the 4.0, you should see some performance gains. I could be wrong. It's been known to happen.
     
  8. Feb 9, 2010 at 4:08 PM
    #28
    jandrews

    jandrews Carolina Alliance Southwest Region Ambassador

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    I run 93 octane for the reasons Xrunnit mentioned and the fact that the engine IMMEDIATELY idled smoother and revved smoother when I ran my first tank of 93.

    It was obviously happier, and with the TRD Catback and CAI it was easy as hell to hear the difference.

    I typically run BP or Shell gas for the high levels of detergent additives they use (above federal requirements).
     
  9. Feb 9, 2010 at 4:13 PM
    #29
    Asgard

    Asgard Well-Known Member

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    I run E10 90 Octane, I burn a quarter tank just pulling out the driveway.
     
  10. Feb 9, 2010 at 4:15 PM
    #30
    Colton

    Colton Reagan/Bush '84

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  11. Feb 9, 2010 at 4:18 PM
    #31
    NAAC3TACO

    NAAC3TACO Well-Known Member

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    Speaking of Shell gas, what's the deal with them putting nitrogen in their fuel? I don't see the advantage. Anybody know? Sorry, I know it's a little off topic, but I keep seeing these Shell nitrogen commercials and I'm curious to know if anybody has noticed a difference.
     
  12. Feb 9, 2010 at 4:22 PM
    #32
    mws4ua

    mws4ua I'll try being nicer if you try being smarter.

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    BP 87 Octane every tank. No problems yet. I'm not a 'performance' guy, so any advantages I might gain from the higher octanes isn't worth the extra cost.
     
  13. Feb 9, 2010 at 4:28 PM
    #33
    jandrews

    jandrews Carolina Alliance Southwest Region Ambassador

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    I asked a buddy who's 6 months out from his PhD in Chemistry and received his BS in Chemical Engineering if there was any substance to this.

    His answer was essentially:

    1) He'd have to know exactly how they're altering the hydrocarbons with nitrogen to know what the effect would be and

    2) He still can't think of any meaningful effect it would have on energy production or compression resistance.

    So it's basically marketing because nitrogen is the big new thing in cars these days?

    Edit: Actually just got off the line with him now:


    (4:27:36 PM) JAK1484: Was just wondering if you had any insight.
    (4:27:54 PM) c9h13no3hcl: well, it really depends on just what they're putting in there
    (4:28:25 PM) c9h13no3hcl: nitrogen is pretty chemically androgenous
    (4:28:43 PM) c9h13no3hcl: can behave a ton of different ways depending on the oxidation state its in
    (4:29:18 PM) JAK1484: I think this is where my eyes start to glaze over?
    (4:29:30 PM) c9h13no3hcl: ya
    (4:29:37 PM) c9h13no3hcl: just making the point that its hard to tell



    Yes, his damned IM name is a chemical formula. For Adrenaline, if you're curious. He's that into it.

     
  14. Feb 9, 2010 at 4:35 PM
    #34
    mws4ua

    mws4ua I'll try being nicer if you try being smarter.

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    I was wondering wtf his name meant. That makes sense.
     
  15. Feb 9, 2010 at 4:42 PM
    #35
    TacoSupreem

    TacoSupreem Dirty Trucker

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    here's what my owners manual says.
    1GR-FE engine---
    Unleaded gasoline, octane rating of 87 or higher. For improved vehicle performance, use premium unleaded gasoline with an octane rating of 91 or higher.
    That being said i have always used shell 93 octane since the truck was new!
     
  16. Feb 9, 2010 at 6:00 PM
    #36
    1TUFFTRD

    1TUFFTRD [OP] WTF

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    I noticed the smoother idleing also with higher octane:cool:
     
  17. Feb 9, 2010 at 6:05 PM
    #37
    1TUFFTRD

    1TUFFTRD [OP] WTF

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    thats exactly what mine says:eek: so i wonder if its year specific?
     
  18. Feb 10, 2010 at 8:00 AM
    #38
    Xaks

    Xaks Cranky & often armed sysadmin

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    I use Mobil 87 regular in mine. I've had nothing but good luck with the stations near my house, and i'm actually kind of picky about it. See, one time many many moons ago as a young lad, I didn't know any better and thought gas was gas, and when I ran low I just pulled into whatever station was nearest and used the cheapest they had.

    Got a bad tank at a Shell and nuked the car with it :( they replaced the tank, but they wouldn't pay for the motor damage, they said it was pre-existing. I got pretty handily screwed.

    Anyhow, ever since then, I'm picky about gas stations. As much about how its transported and delivered as the gas itself!

    Do the drivers drive properly cleaned and dried trucks before taking on the load? Are the tanks at the station cleaned properly and free of FOD and other chemical shit (plus water leaks and the gods only know what else)? What about the pumps themselves, are they calibrated correctly and tracking volume at temperature properly?

    I take all this into account when I move and find new gas stations. A buddy of mine has a mid-6 figure Nissan 350Z with just over 600 horse at the tires, and he does the same thing :) Nice vindication that a guy with a 25 grand motor finds fuel the same way I do ;)
     
  19. Feb 10, 2010 at 6:52 PM
    #39
    Broke

    Broke Well-Known Member

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    i try to use the same gas station (QT) but i always add some lucas fuel injector cleaner 2.
     
  20. Feb 10, 2010 at 6:55 PM
    #40
    k20me

    k20me Well-Known Member

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    I'm required to run 91 octane.
     
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