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93meth gas instead of 87??

This is a discussion on 93meth gas instead of 87?? within the Firebird / WS6 forums, part of the Vehicle Specific category; Can I put 93meth gas into my 98 firebird? I was wondering if there would be any change in the ...

  1. #1
    Member flybird's Avatar
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    93meth gas instead of 87??

    Can I put 93meth gas into my 98 firebird? I was wondering if there would be any change in the perfomance of my car. I just want to make sure.

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    Moderator Firebirdjones's Avatar
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    I'm guessing you aren't talking about E85 right?? In which case,,,,no. Alot of changes need to be made before dumping that stuff in.

    If you are talking about pump gas with 10% Ethanol mixed in,,,yes. It's getting harder to get away from nowadays. It's not that great but.....
    The EPA is now talking about raising it to 15%. If it wasn't crap enough now it's going to really suck.

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    Member flybird's Avatar
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    ha my bad i meant 85. but you say no to 93?

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    Moderator Firebirdjones's Avatar
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    Quote Originally Posted by flybird View Post
    ha my bad i meant 85. but you say no to 93?
    I need more clearification. Is your question towards octane ratings, or the amount of ethanol in the gas??

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    Member flybird's Avatar
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    And i mean i am talking about 93 octain. is the perfomance better. sorry guys just alil tired not payin attention to what im typing..

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    Moderator Firebirdjones's Avatar
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    The performance is better if your engine needs it.

    In the case of the LS1, it should be run on high test. I believe the manual states 91 or better. Keeps the engine out of knock and uses the higher timing tables.
    Would also be more subject to knock if you live in a hot climate.

    You could run lower octane in it if you like. The computer is designed to pull timing in the event of knock. Usually poor gas mileage is a result.

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    Member flybird's Avatar
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    I have a V6 3800 seriers engine. Im 16yrs old not allowed to have a beast v8 yet.. i do live in a hot climate. Houston TX. And honeslty I dont understand what all exactly your saying so im sorry man...

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    Moderator Firebirdjones's Avatar
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    A V6?? In that case you could pee in the tank and it would probably run Just kidding.

    I'd just continue to run 87 in that one. Probably won't see anything spending the extra money.

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    Member flybird's Avatar
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    haha thats always nice to say about a v6. pops thinks ill kill my self ina v8. yall just wait, ina bout 4 yrs ill have my big v8! but alright i was hoping you'd say better performance buttttt its alirght.

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    Moderator Firebirdjones's Avatar
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    Quote Originally Posted by flybird View Post
    haha thats always nice to say about a v6. pops thinks ill kill my self ina v8. yall just wait, ina bout 4 yrs ill have my big v8! but alright i was hoping you'd say better performance buttttt its alirght.
    Just gettin a stab in, it's all good

    Pops has good reason to worry. I think being a parent turns you into a worry wart. Does me anyway. Must be all the things we did as teenagers, but you didn't hear it from me.

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    Senior Member Schmalgar's Avatar
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    Higher octane is only required to prevent knocking in a higher performance engine. By itself it won't get you any more performance. However, some gas companies (notably Shell, but possibly others) do not put their quality detergents in their low octane gas. So you might get a cleaner fuel by going to a higher octane, depending on where you get your gas...

    And don't feel bad about being 'limited' a v6 firebird. I woulda killed for that back when, my starter was a little red tomato of a Tercel...

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    I Drive A 95' AfterYou's Avatar
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    I drive a 95 3800 v6, dont worry man, they are still hell of a lot of a car im 16 and i enjoy it with every second, On main note, I would stick with the normal cheapest gas out there for now, unless youve got engine upgrades, you wont see a differance is any

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    Senior Member justinmc978's Avatar
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    my old 3800 firebird's lifters tapped especially when it was cold. i had to keep 93 octane in it to prevent that.

    performance wise.. you will gain .0000001 seconds in the quarter mile from switching to 87 to 93

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    Moderator Cutlass's Avatar
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    Quote Originally Posted by justinmc978 View Post
    my old 3800 firebird's lifters tapped especially when it was cold. i had to keep 93 octane in it to prevent that.

    performance wise.. you will gain .0000001 seconds in the quarter mile from switching to 87 to 93
    how does gas help with lifter tap?

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    Member unibuga's Avatar
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    Quote Originally Posted by Firebirdjones View Post
    Just gettin a stab in, it's all good

    Pops has good reason to worry. I think being a parent turns you into a worry wart. Does me anyway. Must be all the things we did as teenagers, but you didn't hear it from me.
    i guess my dad dont care when i was 15 i got my 87 formula 350 with the big v8 and now im 18 and just got my ls1

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    Quote Originally Posted by Cutlass View Post
    how does gas help with lifter tap?

    I was wondering the same thing.

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    Quote Originally Posted by Firebirdjones View Post
    A V6?? In that case you could pee in the tank and it would probably run Just kidding.

    I'd just continue to run 87 in that one. Probably won't see anything spending the extra money.
    Negative! Do not run 87 octane in the 3800-II.. We require the same high standards as any ls1 does.. In fact our owners manuals specificly state "nothing lower than 89 octane should be used".. Tho it is a v6 the stereotypes don't work for us and are no more true than the next.. We ARE also considered "high performance" engines as well liek it or not.. Tho the v8 guys do not think so, but that does'nt change the fact that we are also driving performance vehicles..

    The 3800 gets worse gas mileage than the ls1 cars do anytime you can run higher octane do so.. NEVER run 87 octane in your car.. 3800 is ping prone always was since before the days of the "T" type, even tho the engine has changed significantly the tendancy to ping was never designed out.. While an ls1 can run on 87 octane we can not.. If you want to run 87 octane in your car that's up to you, it will run on it.. But look for valve guide issues in your future if you do.. Just my .02, and not trying to piss anyone off..
    Last edited by Smittro; 09-14-2010 at 10:49 PM.
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    Quote Originally Posted by justinmc978 View Post
    my old 3800 firebird's lifters tapped especially when it was cold. i had to keep 93 octane in it to prevent that.

    performance wise.. you will gain .0000001 seconds in the quarter mile from switching to 87 to 93
    Quote Originally Posted by Cutlass View Post
    how does gas help with lifter tap?
    3800-II is a roller engine.. What you were hearing was your injectors showing signs of wear.. We are not prone to push rod problems either.. There may have also been worn rockers, or a flat spotted roller.. I do recall justin stating that his 3800 had a trillion miles on it.. Worn out motors are usually noisy.. Also I'm willing to bet there was more than once the engine was ran with too little oil.. 3800-II loves to us it during WOT, and they love to leak it too.. It happens.. Sorry justin..
    Last edited by Smittro; 09-14-2010 at 07:53 PM.

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    Quote Originally Posted by Schmalgar View Post
    Higher octane is only required to prevent knocking in a higher performance engine. By itself it won't get you any more performance. However, some gas companies (notably Shell, but possibly others) do not put their quality detergents in their low octane gas. So you might get a cleaner fuel by going to a higher octane, depending on where you get your gas...

    And don't feel bad about being 'limited' a v6 firebird. I woulda killed for that back when, my starter was a little red tomato of a Tercel...
    NOPE! 3800 IS a high performance engine like it or not..

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    Quote Originally Posted by AfterYou View Post
    I drive a 95 3800 v6, dont worry man, they are still hell of a lot of a car im 16 and i enjoy it with every second, On main note, I would stick with the normal cheapest gas out there for now, unless youve got engine upgrades, you wont see a differance is any
    Negative the performance gain is in it not pinging.. 87 octane is for lawn mowers not ls1 OR 3800-II....

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