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  #11  
Old 01-09-2010, 11:30 AM
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Thanks for the answer Randy and Tom. I'll stick with the 89 octane and have no worries about performance.
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  #12  
Old 01-09-2010, 12:25 PM
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I run 93 in anything I own.
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  #13  
Old 01-09-2010, 05:14 PM
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Quote:
Originally Posted by OneSickHemiRam View Post
I run 93 in anything I own.
Why? does everything you own have forced induction, high compression ratio, or have a tuner with a specific tune on it? If not you are wasting money on a fuel that won't give you any additional benefits.

Like mentioned elsewhere on the forum. Higher octane fuels are designed to prevent predetonation (or knocking) in an engine with high compression. The manual says you can run 87-89 octane. If you run 87 and notice knocking in your engine, switch to 89 and it should be ok. If it continues, try 93. If you dont' notice any knocking than you are safe running 87. If you dont' think you can hear it, or are just worried, then just run 89 in your Hemi and dont' worry. There is no need to run premium if you dont' have a tuner or hear any knocking. It won't give you any gains in performance or mileage.

Last edited by Bobcat06; 01-09-2010 at 05:17 PM.
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  #14  
Old 01-09-2010, 07:06 PM
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sometimes its the little things that make big changes

most performance mechanics will tell you that indexing spark plugs will improve gas mileage, improve performance, & sometimes even eliminate engine knock .

so maybe if you do have a engine knock using a lower octane gas, it may be corrected by a bit of labor & a set of indexing washers & a felt pen
mileage & performance gains are typically about 3 %
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  #15  
Old 01-09-2010, 07:07 PM
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Quote:
Originally Posted by iRockCrawler View Post
Did you even read the post you quoted???

Higher octane does not equal more power.

I have been running 87 from day 1 with no issues. I have tried 2 consecutive tanks of 89 and could not feel or hear any difference with they way it ran so I stick with the cheaper stuff.
Wow... you must have a lonely life if your thrill for the day is to try to find mistakes or oversights in other posts. I shouldn't need to justify my question for another member to you, but I will clarify anyhow: I meant to specifically ask about 94 octane, because I know it is not available everywhere (at least up here) and perhaps something that had not been considered in this conversation.

I guess I should have worked a little harder when I was in school, so that I could express myself a little more clearly. Lucky for me that I have you to point out my errors.

Maybe from now on I could send my posts to you first, so that you could criticize them before I put them up.
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Last edited by gregster; 01-09-2010 at 10:07 PM.
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  #16  
Old 01-09-2010, 08:36 PM
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Can't we all get along
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  #17  
Old 01-09-2010, 08:45 PM
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Quote:
Originally Posted by gregster View Post
Wow... you must have a lonely life if your thrill for the day is to try to find mistakes or oversights in other posts. I should justify my question for another member to you, but I will clarify anyhow: I meant to specifically ask about 94 octane, because I know it is not available everywhere (at least up here) and perhaps something that had not been considered in this conversation.

I guess I should have worked a little harder when I was in school, so that I could express myself a little more clearly. Lucky for me that I have you to point out my errors.

Maybe from now on I could send my posts to you first, so that you could criticize them before I put them up.
Welcome to the internet, if you are prone to getting your feelings hurt, maybe it isn't the place for you. It's just the nature of the internet, sorry. But there is actually a lot less of that here than on other forums, believe me.

As for your questin about 94 octane, No you will not get any benefits from this. This is almost identical to premium (which is 93 octane). Some places sell up to 106 octane, used as race fuel. Don't bother with this either unless you have a race bred monster.
Unless you know your engine well enough to know you need higher octane fuel, most likely you don't. Just stick to the manual (for a hemi it's 87-89).

Last edited by Bobcat06; 01-09-2010 at 08:47 PM.
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  #18  
Old 01-09-2010, 08:46 PM
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And yes, you can rectify the knocking by switching back to 89 octane, see my previous post.
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  #19  
Old 01-09-2010, 10:06 PM
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Quote:
Originally Posted by GTyankee View Post
sometimes its the little things that make big changes

most performance mechanics will tell you that indexing spark plugs will improve gas mileage, improve performance, & sometimes even eliminate engine knock .
I'd be inclined to say those mechanics are idiots. Indexing plugs is for clearance in high performance engines with domed pistons that extend into the chambers.
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  #20  
Old 01-09-2010, 10:10 PM
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Quote:
Originally Posted by Bobcat06 View Post
And yes, you can rectify the knocking by switching back to 89 octane, see my previous post.

Thanks for the answer...

...and thanks for explaining the social dynamics of the internet to me also. At least now I will know that not everyone online is as nice as Mr. Rogers.
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