Hybrid Car – More Fun with Less Gas

better mileage with higher octane? - Page 5

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Posted by Eeyore on January 2, 2007, 6:23 pm
 


CJT wrote:


It doesn't. Energy has nothing to do with it.

High octane fuel has less energy than low octane in any case.

Graham


Posted by clare at snyder.on.ca on January 2, 2007, 7:12 pm
 
On Tue, 02 Jan 2007 18:23:01 +0000, Eeyore


Not necessarily (and usually not) true. This is a MYTH that has been
going around for years. If octane is increased by adding ethanol, it
is true. If it is inproved by catylitic cracking og the feed stock, it
is not true.

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Posted by clare at snyder.on.ca on January 2, 2007, 7:09 pm
 

It didn't - but it allowed the engine to extract more of the energy
that the fuel contained by running at a more efficient setting.

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Posted by Solar Flare on January 3, 2007, 3:04 am
 

Octane slows down the burn and allows more power to be extracted from
the fuel, stops the pinging but the engine timing must be adjusted to
suit. Lead had more cooling effect for lower temperature valves and
other parts.



Posted by Eeyore on January 3, 2007, 3:17 am
 



Solar Flare wrote:


A decent ECU will do that instantaneously 'on the fly'.

Graham


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