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  #16  
Old 01-27-2011, 09:51 PM
foxracer025 foxracer025 is offline
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Default Re: Gasoline/Octane Questions

http://www.state.mn.us/mn/externalDo...ctaneFacts.pdf

in certain areas you are both right.
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  #17  
Old 01-27-2011, 11:13 PM
pooleo pooleo is offline
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Default Re: Gasoline/Octane Questions

^^thats a good page. about the higher octane fuel tho, I run 110 race fuel in my harley, I know for a fact that bike runs a shit ton better than with 87. The difference is night and day. I mean you can feel the difference in power running the 110. so idk, in a perfect world with perfect conditions maybe it "should not" make a difference. But I will continue to burn the higher octane. besides, the race fuel smells good
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  #18  
Old 01-28-2011, 05:33 AM
rwenzing rwenzing is offline
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Default Re: Gasoline/Octane Questions

There was a time when "premium" fuel supposedly got a better additive package than "regular". Today, most fuel grades from most manufacturers use a similar package across fuels of all octane ratings. I wouldn't buy premium just to get some mythical extras.

Higher octane fuel has a slower flame propogation rate and that's why it resists detonation better. If your engine does not ping excessively on 87 octane, there is no need to buy more expensive fuel. Very light pinging does not do any harm other than the irritation factor. Prolonged, heavy detonation can be disastrous.

As far as fuel economy goes, there has traditionally been no benefit to running a higher octane fuel in an engine that didn't need it for detonation suppression. But that was before knock sensors.

Early knock sensors simply allowed the PCM to pull back ignition timing when the resonant frequency of knock was detected. With these engines, there is still no FE benefit to using higher octane fuel.

Many newer PCM's use an advanced strategy to take better advantage of the knock sensor. With these, the PCM not only has the capability to retard the spark as a response to knock but, under certain conditions, it may also slowly ramp in more spark advance when knock is not being detected. So, in a system like this under the right conditions, it is possible to see a small but real FE improvement using higher octane fuel.
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  #19  
Old 01-28-2011, 03:28 PM
FireRanger FireRanger is offline
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Default Re: Gasoline/Octane Questions

Quote:
Originally Posted by pooleo View Post
^^thats a good page. about the higher octane fuel tho, I run 110 race fuel in my harley, I know for a fact that bike runs a shit ton better than with 87. The difference is night and day. I mean you can feel the difference in power running the 110. so idk, in a perfect world with perfect conditions maybe it "should not" make a difference. But I will continue to burn the higher octane. besides, the race fuel smells good
You are proving my point for me. Your bike's motor is DESIGNED TO OPERATE WITH THAT FUEL. Of course it works better with it and runs like crap on 87. That's what I've been saying the whole time. Our motors in our trucks are designed for 87 and anything other than that, higher or lower, is going to cause problems.
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  #20  
Old 01-28-2011, 03:59 PM
pooleo pooleo is offline
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Default Re: Gasoline/Octane Questions

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Originally Posted by FireRanger View Post
You are proving my point for me. Your bike's motor is DESIGNED TO OPERATE WITH THAT FUEL. Of course it works better with it and runs like crap on 87. That's what I've been saying the whole time. Our motors in our trucks are designed for 87 and anything other than that, higher or lower, is going to cause problems.
I can assure you that my sportster manual recommends 87 octane. it is DESIGNED TO OPERATE WITH 87. It runs a shit ton better on 110.
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Ball Joints/Upper A-Arms How To
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VIDEO OHC Install
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  #21  
Old 01-28-2011, 04:00 PM
FireRanger FireRanger is offline
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Default Re: Gasoline/Octane Questions

Oh. Well then something is just wrong with it then. If an engine designed for 87 runs better on higher octane, then it has some serious problems inside.
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  #22  
Old 01-28-2011, 04:02 PM
pooleo pooleo is offline
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Default Re: Gasoline/Octane Questions

Have you real world experience with your claims...? Im not talking proof that you have read or on a dyno, thats not real world. I do, I have logged many thousands of miles, 87, 93. The data does not lie. Running the 93 octane in our trucks will not harm them. In my real world experience it has helped fuel mileage.

----------

I respect your POV, My claims are based on what I have seen/done.
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Quote:
A Gladiator does not fear death. He embraces it. Caresses it. Fucks it. Each time he enters the arena, he slips his c0ck in the mouth of the beast, and prays to thrust home before the jaws snap shut. - Oenomaus
Ball Joints/Upper A-Arms How To
Replace Door pin/bushing
Repair broken dome light tabs
VIDEO OHC Install
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  #23  
Old 01-28-2011, 04:06 PM
FireRanger FireRanger is offline
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Default Re: Gasoline/Octane Questions

So are mine on many vehicles of my own and friends and families. And I also have science and logic more or less on my side. So we're just going to disagree.
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  #24  
Old 01-28-2011, 04:08 PM
pooleo pooleo is offline
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Default Re: Gasoline/Octane Questions

agreed to disagree.
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Quote:
A Gladiator does not fear death. He embraces it. Caresses it. Fucks it. Each time he enters the arena, he slips his c0ck in the mouth of the beast, and prays to thrust home before the jaws snap shut. - Oenomaus
Ball Joints/Upper A-Arms How To
Replace Door pin/bushing
Repair broken dome light tabs
VIDEO OHC Install
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  #25  
Old 01-28-2011, 05:25 PM
dirttrackracer dirttrackracer is offline
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Default Re: Gasoline/Octane Questions

agree to say that most bikes are desinged and factory says to run 87 how do i know you say?? i work in a small engine shop or a dirt bikes quads mopeds street bikes cruisers etc. MOST say to run 87 but there are some that say that it will run better on 91 or higher so boath of you are right
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  #26  
Old 01-29-2011, 09:01 AM
richarddhoward richarddhoward is offline
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Default Re: Gasoline/Octane Questions

I have a 4 year degree in diesel, one of my courses was in fuels, there is NO NEED to run your engine with premium or mid grade fuel unless you are supercharged, high compression, turbo'd etc. On a stock, intakes and exhaust don't count, engine all you need is 87 unless the manufacturer calls for something else. Octane is the resistance to burning, a sc'd, turbo'd, or high compression engine will make the fuel burn to early running 87, so they require mid grade or premium. There are no benefits, other than catching your credit card on fire and saving your credit line, to adding premium in a Ranger. The additives companies put in fuel, they put in all of their fuels, regular, mid grade and premium, there is no added cleaning agent that is better in a higher octane either. Just run 87, enjoy the savings, and keep cruising till the need hits E.

Bikes require higher octane, and will run better, read your manufacturer's supplied hand book to tell you what the best octane is for each application.
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  #27  
Old 02-05-2011, 09:34 PM
drummerboy40 drummerboy40 is offline
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Default Re: Gasoline/Octane Questions

2-shay
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