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premium, mid grade, or regular gas???

Discussion in 'The Garage' started by George_Pimpdaddy, Mar 22, 2005.

  1. George_Pimpdaddy

    George_Pimpdaddy 1/2 ton status

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    hi i have a 89 blazer with a new rebuilt 350 and a 700 r4 and was wondering if running on premium or even mid grade gas is better for the engine or even power that would be noticable on a daily driver also what about gas milage does that go up with a higher octane gas??? i currently am running premium in my truck am i wasting money on the higher octane???
    thanks for any info:cool1:
     
  2. sled_dog

    sled_dog 1 ton status

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    blowing your money. It is ALWAYS best to run the LOWEST octane rating you can. You will make more power running the lowest Octane you can. If you can run it on regular and you run it on Premium you are hurting power.
     
  3. cbbr

    cbbr 1 ton status GMOTM Winner

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    I agree, waste of money. Regular works just fine.
     
  4. George_Pimpdaddy

    George_Pimpdaddy 1/2 ton status

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    thank you for your responses i guess ill be switching back to regular again:rolleyes:
     
  5. jekquistk5

    jekquistk5 Weld nekid Premium Member GMOTM Winner

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    The only way youll get more power out of a higher octane is to increase your compression. If you didn't do that on your rebuild your wastin money!
     
  6. sled_dog

    sled_dog 1 ton status

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    Can advance your timing as well, kind of pointless after a point though.
     
  7. Emmettology 101

    Emmettology 101 3/4 ton status

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    But in the past I have tried both and have gotten better MPG with Premium over regular... Not sure how cost effective it was though. I gained some MPG, but it also costs more.
     
  8. Eric M.

    Eric M. 1/2 ton status

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    I started running Prem. in all my rigs. I figured I was spending so much on gas as it was, what the heck. I noticed the vehicles without spark advance were not pinging as much and seemed to have a little more power (it wasn't much ... it may even have just been my imagination!). The vehicles with spark advance did have more power. I guess they weren't automatically retarding the timing when pinging happened since the higher octane fuel pinged less. I don't know about milage and I'm sure it isn't cost affective, but, I do it anyways.



    Eric M.
     
  9. RustyMule

    RustyMule Registered Member

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    Premium, due to 10:1 compression!
     

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