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What grade gas do you use?

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by Kelboski, Aug 28, 2000.

  1. Kelboski

    Kelboski 1/2 ton status

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    i've always run regular...but many people have different opinions on which is best and why....what do ya'll use..regular has always worked fine for me....Kelboski
     
  2. BlazerGuy

    BlazerGuy 3/4 ton status

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    I use regular, and it works fine for me. Sometimes I'll fill up with Super, but it's expensive[​IMG]!

    [​IMG] Sept 1
     
  3. Kelboski

    Kelboski 1/2 ton status

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    i know that's the truth
     
  4. Orange

    Orange Registered Member

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    I use diesel #2 being that I have a diesel and all. ON my 350 suburban I just use regular because it's the cheapest and it seems to run fine. I think it's 87 oct.


    Orange 84' Jimmy
     
  5. Blazer79

    Blazer79 1/2 ton status

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    Location:
    Guatemala, Central America
    Mexican Tequila!
    ...Just kidding

    I use regular, the cheapest I can find.

    <font color=blue>//////
    http://blazer79.coloradok5.com
    </font color=blue>[​IMG]
     
  6. jcg

    jcg 1/2 ton status

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    I can't afford to run anything other than regular. Last summer when gas was really cheap I ran Mobil Super+. I still can't believe that stuff was as low as $1.10 here.

    Joe
    Rochester Institute of Technology Team Mini-Baja
    88 Jimmy
     
  7. DMK

    DMK 1/2 ton status

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    When I used 87 in my 87 got alot of pinging. Switched to 89 and sometimes use 93. No more problems. If you have no pinging regular should be just fine.
     
  8. AJMBLAZER

    AJMBLAZER Better to be lucky than good. Premium Member

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    I always run 89 octane, but I tried running 87 for a little while. It ran fine, and was about 10 cents a gallon cheaper. [​IMG] However, I got about 20-30 miles less per gas tank. Put the 89 back in, back came the mileage. I figure it this way, it costs me less to run the 89 octane, than to run the 87 octane and have to fill up that much faster. I dunno. [​IMG]

    1992 Blazer Sport, 350 TBI, 4L60, 3" Gibson, K&N, 3" Rancho, 285/75R16 on 16x8 Baja's
     
  9. Kelboski

    Kelboski 1/2 ton status

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    what would be the reason for the increased mileage with th 89 grade instead of the 87?
     
  10. lowlevell

    lowlevell 1/2 ton status

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    I run 87 in my 89 sub(350,700r) and it does fine,Heh there for awhile it was costing me over $60 to fill up=(.When i had my 87K5(305,4 speed)i ran 89 because it was a sled with 87.The K5 also didnt have any emmisions crap.And it had headers=)..WOOHOO------> later
     
  11. blazer72

    blazer72 1/2 ton status

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    A round town I run the cheap stuff(87) when I plane on towing something, traveling cross country, or doing some hard off roading I run the best I can get as the motor will be working hard and needs a ll the help it can get.

    I understand the jeep thing I drive a BLAZER!!

    Ken
     
  12. Burt4x4

    Burt4x4 3/4 ton status

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    I have allways use 92.
    Last week I had to use the K5 as my commuter viehicle cuz my wifes car was in the body shop. Anyway I decided sence I was gonna burn 12-15 gallans a day I would switch to 87.
    tward the end of the week my rig started 'desling' when I shut down the motor! It also seemed to backfire more.
    I know my carb hasent been tuned for 15K miles or so, that may have smething to do with it but man the 92 sure does agree more with my rig!! I'm stickin with the top shelf stuff!! Smotther and less of a hangover[​IMG]

    Rock ON![​IMG] 72 K5 [​IMG] Led Zeppelin
    http://burt4x4.coloradok5.com
     
  13. jarheadk5

    jarheadk5 1/2 ton status

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    I use 89. No pinging and I didn't really notice a difference between the 89 and the 93. Other than my wallet being thinner and lighter...

    [​IMG] Semper Maintenance!
     
  14. laketex

    laketex 3/4 ton status

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    I use 87 here in Sherman area, but when I lived in Lubbock we had 86 so I got that. haha. cheaper is better. Just buy good gas, not from the places that sell it 10 cents cheaper and look like a dump. We have EZ mart here and they have a notorious problem with bad gas, lots of water in it. I won't run gas from them...I go to Exxon.

    [​IMG][​IMG]
    Durant, Ok
    '79 Blazer in progress
     
  15. Jason73K5

    Jason73K5 1/2 ton status

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    87 for me, it works just as good as the 91 or 93 in my truck.
     
  16. MudRebel350

    MudRebel350 1/2 ton status

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    I always run 93. From what Ive been told it runs cooler and I dont get any pings even with my egr valve disconnected. It gets pretty good gas mileage too for around town driving. I drive about 7 miles a day during the week to work and a few more on weekends and I kill off about half a tank in about 2- 2.5 weeks with a 40 gallon tank.

    JD
    88 Gmc Jimmy
     
  17. 82Jimmy

    82Jimmy 1/2 ton status

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    I use regular and methonal, uh...its transmission cleaner and its pure methonal...runs a lot better and hotter i think [cry] my 2 cents of jabber

    <font color=blue>If its too loud, your too old.</font color=blue>
    http://82Jimmy.coloradok5.com
     
  18. '73 K5

    '73 K5 1/2 ton status

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    If you have a stock motor with stock compression, 87 octane will usually be fine. The compression ratio is the main factor, but heat and altitude also can play a role in what octane gas you should use. I have Vortec heads on my Blazer with higher compression, so I have to run 89-91.

    '73 K5
    Chevy good...Ford bad
     
  19. Heath-La. 89GMC

    Heath-La. 89GMC 1/2 ton status

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    I use whatever is on sale.
     
  20. Canuck

    Canuck 1/2 ton status

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    Mohawk ethanol 94 octane. It's the best. Well it don't know if it is or not but I like to think so. Frigg'in expensive though. .89 cents per litre.

    Canuck

    Go Wide or Stay @ Home
     

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