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OCTANE 100 ron 

 

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 Post subject: Re: OCTANE 100 ron
Posted: Tue May 11, 2010 10:46 pm 
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Trav 4.0 wrote:
peaandham wrote:
Yes i do mean Norlunga, Morphett Vale, Christies Beach area !

Also what is Octane really? and what parts of the car can it clean? I filled up with 98 from Both Mobil, and BP and just want to know what Octane is and how the fuel helps clean a motor !


Too hard to explain. But the bigger number, the bettera it is.


My understanding is the bigger the octane number the more resistance it has until compustion, making your car burn it less often

 

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 Post subject: Re: OCTANE 100 ron
Posted: Tue May 11, 2010 10:48 pm 
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tickford_6 wrote:
peaandham wrote:
Yes i do mean Norlunga, Morphett Vale, Christies Beach area !

Also what is Octane really? and what parts of the car can it clean? I filled up with 98 from Both Mobil, and BP and just want to know what Octane is and how the fuel helps clean a motor !


The octane rating of fuel is purely its resistance to knock. It is NOT a measure of the actual amount of octane in the fuel. (hence you can get fuel with an octane over 100)

RON is tested with a variable compression ratio single cylinder engine.
Mixtures of iso-octane and n-heptane are tested. Pure iso-octane will achieve an RON of 100, and n-heptane will achieve and RON of 0.

A sample fuel is tested in the engine and the compression ratio is increased until the fuel knocks. the ratio is then checked against the result from testing the iso-octane and n-heptane, if the sample fuel knocks at the same compression as say a 91/9 mix of iso-octane and n-heptane, the fuel is deemed to be a 91 RON fuel.

To measure above 100ron the graph is simply extended beyond 100 at the same rate of change.

Thats a great explination! :wink:

 

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 Post subject: Re: OCTANE 100 ron
Posted: Tue May 11, 2010 11:39 pm 
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if you run 91 ron all the time one tank of 98 isnt going to do much. I found using it repeatedly gave a better result. I also get better mileage out of 98, and it feels smoother, and more mid range urge. its not a massive difference but its noticble when i go back to 91. not really noticble when i go to 98 if you get me, because the gains come on as the engine adjusts over time. So Im usuaally bumed if I cant continue to afford 98 lol.

 

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 Post subject: Re: OCTANE 100 ron
Posted: Tue May 11, 2010 11:46 pm 
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Is it possible to get booze and add some when you run 92?

 

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 Post subject: Re: OCTANE 100 ron
Posted: Wed May 12, 2010 4:51 pm 
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I am on my Second tank of 98ron was using Bp now trying Mobil, and i was reading on a Bp Site that the valve springs are meant to be spotless after 10,000k's so after 16 more tanks i theoretically should be laughing !

 

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