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Thread: ethanol free 87 vs ethenol free 93

  1. #1
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    Default ethanol free 87 vs ethenol free 93

    I just noticed a gas station that is closer to home now has ethanol free 87. I am running a 2002 mercury 40hp, should I stick with the 93 or would 87 be ok ? Maybe this is common, but I haven't seen any stations with 87.
    Last edited by duckz; 07-11-2019 at 12:32 PM.

  2. #2
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    93 non ethanol was replaced by 90 octane a couple years ago. If they were advertising 93 it is probably mis branded.

  3. #3
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    you sure. I looked at the list and saw quite a bit of 93 options. The station I usually go to even says 93 on the pump.

  4. #4
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    They still make 93 with ethanol but the only ethanol free options that I’m aware of are 87,89, and 90

  5. #5
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    Check owners manual. What was the ignition tuned for?


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  6. #6
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    Don’t have the manual but mercury.com said 91+ , guess that solves that.

  7. #7
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    A stock mercury 40 does not have a high enough compression ratio to benefit from high octane, run 87 all day

  8. #8
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    Quote Originally Posted by duckz View Post
    you sure. I looked at the list and saw quite a bit of 93 options. The station I usually go to even says 93 on the pump.
    I think that list outdated

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  9. #9
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    We sell 93 non-eth we pull from the pipeline. We also have 87 and 89 non-e in bulk.

  10. #10
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    So who here knows what they are talking about?

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    ME!!!!!!!!!!
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  12. #12
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    Quote Originally Posted by hickory View Post
    We sell 93 non-eth we pull from the pipeline. We also have 87 and 89 non-e in bulk.
    Where is your establishment and is it open to the public?

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    Last edited by willyworm; 07-13-2019 at 01:30 PM.
    [SIGPIC][/SIGPIC]
    Delta in a nutshell: Breeding grounds + small wetlands + big blocks of grass cover + predator removal + nesting structures + enough money to do the job= plenty of ducks to keep everyone smiling!

    "For those that will fight for it...FREEDOM...has a flavor the protected shall never know."
    -L/Cpl Edwin L. "Tim" Craft

  13. #13
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    93 at the pump in Myrtle. We even have a new spot that has 97 High Octane.

    17BE1353-49DC-46E5-93A6-73A180E057C8.jpg

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