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Car feels different after using 91 gas... #293681 Oct 6, 9:41pm Oct 6, 9:41pm
Joined: Sep 2004
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Central Ca
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Car feels different after using 91 gas...
I used to put 87 gas in my car, but the past two times I put gas I have been using 91. Today I noticed that my car feels a little different. It's hard to explain, but it's like the car drives more smooth. The shifts feel more smooth, etc. It just feels like the car is lighter for some reason.

Maybe I am imagining it? But I know I'm not. cry

It's really hard to explain the difference, but it is bothering me. Even though the difference is somewhat postive (car feels more responsive, lighter, smoother), I'm still wondering if there is something wrong because I don't think a gas can change the car that much confused


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Re: Car feels different after using 91 gas... [Re: jl2fast4u] #293682 Oct 6, 9:44pm Oct 6, 9:44pm
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superderk
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i did the same thing when i had my prelude. i noticed better gas mileage and smoother idle and better response.


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Re: Car feels different after using 91 gas... [Re: superderk] #293683 Oct 6, 9:47pm Oct 6, 9:47pm
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stefanoc
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it will make a bit difference. no, it wont make ur shifts smoother though hehe. it will give you better throttle response, and saying that you feel lighter is that cz you pushing it lightly and the car is responding a bit better. i really dont know bout this, but i dont think its a good idea to switch back to 87 once you started using 91. im just assuming.

Re: Car feels different after using 91 gas... [Re: stefanoc] #293684 Oct 6, 9:49pm Oct 6, 9:49pm
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Originally Posted by stefanoc
it will make a bit difference. no, it wont make ur shifts smoother though hehe. it will give you better throttle response, and saying that you feel lighter is that cz you pushing it lightly and the car is responding a bit better. i really dont know bout this, but i dont think its a good idea to switch back to 87 once you started using 91. im just assuming.



Yeah I'm going to stick with 91, but I was just wondering what the hell it did to my car confused


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Re: Car feels different after using 91 gas... [Re: jl2fast4u] #293685 Oct 6, 10:24pm Oct 6, 10:24pm
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gas prices are too crazy here for me to use 91 regularly. 87 is already 2.55 around here

Re: Car feels different after using 91 gas... [Re: ghostingcelica] #293686 Oct 6, 10:25pm Oct 6, 10:25pm
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wa
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Do you have a GTS? If so you should have never been running anything lower than 91 octane.

Re: Car feels different after using 91 gas... [Re: 2000gts6speed] #293687 Oct 6, 10:28pm Oct 6, 10:28pm
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Originally Posted by 2000gts6speed
Do you have a GTS? If so you should have never been running anything lower than 91 octane.



I have a GT.


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Re: Car feels different after using 91 gas... [Re: jl2fast4u] #293688 Oct 6, 10:30pm Oct 6, 10:30pm
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Oh... didn't see your sig.

Re: Car feels different after using 91 gas... [Re: jl2fast4u] #293689 Oct 6, 10:31pm Oct 6, 10:31pm
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stefanoc
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better gas means better combustion and less burning gas. long story but basically its cleaner so it burns less and you get a bit better output, a little bit more response from a higher octane gas. thats why some gts owners put racing fuel, not that it adds crazy HP, it just gives a better response overall.

Re: Car feels different after using 91 gas... [Re: stefanoc] #293690 Oct 6, 10:57pm Oct 6, 10:57pm
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Our engines don't knock, so why should it matter? confused


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Re: Car feels different after using 91 gas... [Re: Sancho] #293691 Oct 7, 7:49am Oct 7, 7:49am
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Well, as long as you're not getting any knock/ping, 87 is fine. I suppose you might get a little smoother run with higher octane. Whether its worth it you have to judge for yourself. You might try the mid-grade 89 octane as a compromise. Or try running some fuel injector cleaner through the tank, go back to 87 octane, and see what that's like.


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Re: Car feels different after using 91 gas... [Re: ExNihilo] #293692 Oct 7, 8:01am Oct 7, 8:01am
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91 octane is pretty pointless in THEORY in a GT, however from experience they run better.

I think it's because the engine has multi-point FI.

In other 1zz-ge cars like a corrolla, it doesn't make a bit of difference, but the GT is more highly tuned.


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Re: Car feels different after using 91 gas... [Re: DiabloGTS] #293693 Oct 7, 11:51am Oct 7, 11:51am
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higher octane the cleaner and easier to burn...

Re: Car feels different after using 91 gas... [Re: ragingpaseo] #293694 Oct 7, 12:53pm Oct 7, 12:53pm
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The manual says 87 for GT and 91 for GTS but, I have a GT and use 91 and it just runs smoother. I had to use 87 for a day and my car just isn't liking it. Besides I have 130k on it and I want to help promote longevity as much as possible.


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Re: Car feels different after using 91 gas... [Re: RedCelly00] #293695 Oct 7, 2:19pm Oct 7, 2:19pm
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do some fuel injector cleaner...change your fuel pump...

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