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On 13 Jul 99, at 22:33, Steven Ayres wrote: > > lower-octane fuel burns *hotter*. > > JimA=> Not true. > > OK, tell me where I get off track: > > Octane is added to fuel to slow down the burn. Right here. Higher octane gas does not burn any slower or faster than low octane gas. A high octane rating just means that the fuel is less likely to combust spontaneously under compression (dieseling.) This just allows the combustion to be controlled by the spark rather than by the somewhat random influences of knock. Jim - ******************************* Jim Adney, jadney@vwtype3.org Madison, Wisconsin, USA ******************************* ------------------------------------------------------------------- Search old messages on the Web! Visit http://www.vwtype3.org/list/