Gas type for 2017 Civic Hatch LX??

  1. Bhartz412

    Bhartz412 Member

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    So the manual says MINIMUM 87 octane required, would using 89/91/93 be beneficial at all? Or even harmful? I read a Car and Driver article that said CR-V's Inline 4 turbo didnt benefit from higher, but I've seen other people say that no matter what, turbo should use 91+, any opinion? I know that Sport/Type R require more but just wondering about LX
     
  2. Wh1SL3R

    Wh1SL3R Member

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    Just use the minimum required octane or higher. Higher octane will not harm your engine. Some say that you should always use 91+ for forced induction motors due to the higher resistance to pre-detonation (knock). Without getting too technical, the manufacturer will recommend a higher grade if it is necessary.
     
  3. Mae22

    Mae22 Member

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    There are eleventy-million threads on this, hashing and re-hashing it dead into the ground. Do a search, and you will find every piece of information and opinion under the sun.
     
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  4. parshisa

    parshisa Senior Member

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    I’m running premium in my hatch with helped a ton with fuel dilution. In my book, anything of that low displacement paired with turbo needs higher octane. Just my opinion
     
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  5. mis3

    mis3 Senior Member

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    Have no idea that premium gas can help with the he oil dilution problem. How so?
    I have a SI and I use mostly premium gas.
     
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  6. parshisa

    parshisa Senior Member

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    From what I understand With higher octane timing is being advanced therefore engines runs leaner, less fuel being dumped and unburnt causing the oil to dilute
     
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  7. Civic_Scott

    Civic_Scott Senior Member

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    Wouldnt the computer just compensate for the higher octane, I doubt from my readings and understandings that it would benefit the engine any.
     
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  8. parshisa

    parshisa Senior Member

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    My UOAs certainly support this theory
     
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  9. FK7 Civic Pilot

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    #9 FK7 Civic Pilot, Aug 23, 2019
    Last edited: Aug 23, 2019
    My wife's cousin works as a chemical engineer at Calumet Montana Refining. When I asked him basically the same question, his short answer is the only difference between regular and premium grade is the octane count, the additives are exactly the same. ( this is in regards to his refinery, but he did go on to say some refineries such as Shell do have differences in how they refine gas, Shell Gold for example has zero ethanyol and supposedly more additives ) That said, on a bone stock car you won't notice a difference running premium, but if your car has a tune, it's probably a good idea to use the higher grade. Some tuners like TSP require premium. Running datalogs, when I use 91 premium my knock control stays around 52-54, never getting above 60 in hard driving. When I ran 87 regular, the knock control averaged 70-72, with a high of 93 during hard driving once, and the effect on performance was noticeable and gas mileage also dropped, although it was less than half a mile per gallon. For me, the extra $3 per tankful for premium isn't that big of a deal, and I'd rather get the most out of getting a custom tune.
     
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  10. OP
    OP
    Bhartz412

    Bhartz412 Member

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    Unless you have n
    wow that's a great answer, thank you!
     
  11. mc21

    mc21 Member

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    It won't be beneficial at all. It will just cost you more money for gas. https://www.cars.com/articles/if-my...od-to-use-premium-occasionally-1420684149356/
     
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  12. Shankmeyster

    Shankmeyster Senior Member

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    #12 Shankmeyster, Aug 23, 2019
    Last edited: Aug 25, 2019
    I mean if you're going to run lower octane, do it during the colder months as detonation/knock won't be such an issue, but I would run 91 during the summer if it is hot where you live to avoid the chance of it.
    EDIT: I am only speaking for the turbo. The NA 2.0 can run 87 all day erry day.
     
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  13. raf702

    raf702 Senior Member

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    I would use the minimum required per the owners manual. But personally for me, I use 91-oct for peace of mind. And I have a 2016 LX-P 2.0NA
     
  14. AlphaMoose67

    AlphaMoose67 Member

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    I’m probably gonna continue to use 91. It costs roughly $2 more per tank than 87 at the gas station a block from home.
     
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