Re: Good fuel/Best fuel

[Jim Gillespie <jim@xxxxxxxxxxxx>]

> Here in lower OZ we have [...] a new product [...] Optimax. It's a
> high octane unleaded fuel with a 98 octane rating.
[...]
> Because of the fuel being of a higher value you don't need to use as
> much for the same power output if you ride/drive the same way.

	This is rather an over-simplification.  The octane number indicates
anti-knock properties, not the "power" of the fuel - high-octane fuel
allows the engine to be run with a higher compression ratio (amongst
other things), but all other things being equal you would not gain any
power or economy simply by using higher octane fuel.

	Going by octane numbers, you only need the lowest octane number that
doesn't cause knocking.

	I'm not saying that the Optimax fuel isn't better, just that the octane
number is not directly related to the improvements.

	Aha: http://www.cs.uu.nl/wais/html/na-dir/autos/gasoline-faq/part3.html

                Jim
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