Re: MPG

[mit-eddie!iris.brown.edu!ejd@EDDIE.MIT.EDU]

Someone (I can't decipher the header) writes:

Speaking of octane, has anyone had experience with mixing leaded
regular and unleaded premium? The theory is that the result should have
higher octane than the unleaded rating.
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I've tried this in the 10:1 compression 'cuda, and it didn't seem to make
too much of a difference; note that I didn't try futzing with the timing
to take advantage, and that at the time the car had a very silly camshaft
that basically was all overlap (previous owner wanted a 'race cam') so that
the cylinder pressures stayed pretty low at RPMs that would still allow
one to hear pinging :-).

Additionally, I remember reading a year or so ago that the reduced lead
available in current leaded gas was insufficient to allow the octane 'pushing'
effect that mixing might have.

Try it for yourself, though - I for one would appreciate knowing your results.

ed devinney