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Thread: Regular vs Premium Gas

  1. #21
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    Quote Originally Posted by DirtyMicra23 View Post
    91 all day every car. 87 is piss poor gas and if you dont have en electric motor getting you going you're just gonna burn through more gas when you push the car. Dont flip flop though, use one or the other and let the engine learn the fuel trim. I strongly recommend warming up the engine I find I get way better gas millage when I let my car warm up for quite a while.
    87 is no more "piss poor" than 91. it has less octane. If you understand combustion, gasoline and thermodynamics. then, you would realize that for the micra 91 is piss poor. 87 octane makes more power, therefore you will get better gas milage, and also, be heavier in the wallet. Same with my Jeep patriot. 87 gets better milage than 91....why? because it makes more power. Look it up sometime before making blanket statements like piss poor gas if you have no idea what you are talking about.



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  3. #22
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    Won't 91 give a few more horsepower on the Micra? I am saying this because Lexus and Acura use similar engines to Toyota and Honda, but they modified the engine or the ecu and it require premium gas for the extra bump in power. I been using regular for a month and premium for a month, and found no difference.

  4. #23
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    It depends if the car was designed for it. If the car calls for 91 and you use 87, the car will retard timing and you will drop a couple of hp. but its not an inverse reaction with a car going from 87 which is was designed for to 91. you will not gain any hp. Its not using 91 for extra horse power, its using 91 for resisting knock and detonation from higher compression ratios and advance timing. In the micra, 91 is pissing away your money....nothing more. I am a mechanic, and built race engines etc.

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  6. #24
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    Quote Originally Posted by kojack View Post
    It depends if the car was designed for it. If the car calls for 91 and you use 87, the car will retard timing and you will drop a couple of hp. but its not an inverse reaction with a car going from 87 which is was designed for to 91. you will not gain any hp. Its not using 91 for extra horse power, its using 91 for resisting knock and detonation from higher compression ratios and advance timing. In the micra, 91 is pissing away your money....nothing more. I am a mechanic, and built race engines etc.
    Glad to see someone else understands this issue..."money for nothing"!

    Thanks...

        __________________________________________

        click to view fuel log View my fuel log 2016 Micra Active manual: 6.0 L/100 km ... 46.9 mpg (Imp) ... 16.6 km/L ... 39.0 mpg (US) ...


  7. #25
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    Yes. I do. and you are welcome.



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