Perhaps it's a trick of psychology, but I could have sworn the car was
running better and seemed to have more power. I could not quantify it with
hard scientific data, so we won't bother with trying to prove otherwise
I can however quantify that higher octane gas DOES provide better gas
mileage. Three cars no less... '67 Datsun 1600. 85 octane got 26.4 mpg,
89 octane got 28.9 and the 91 octane got 31.4 mpg. '95 Geo Metro. 89
octane = 36 mpg 91 = 40-45 mpg '00 Buick Regal 89 octane =26.7 mpg , 91
octane = 29.5 mpg. This data was obtained on my 158 mile commute every day
at 5280-8100 feet altitude and 90% was highway miles. The Geo and the
roadster can both run on the cheap 85 octane crap, but what's the point when
you get better mileage out of the expensive stuff? :)
Eric
----- Original Message -----
From: Vicki Burrows <gregnvicki@earthlink.net>
To: Eric Frisbee <efris@qwest.net>
Cc: Gary K. McCormick <svgkm@halley.ca.essd.northgrum.com>;
<SPL311RDST@aol.com>; Datsun Roadster List <datsun-roadsters@autox.team.net>
Sent: Thursday, May 30, 2002 8:24 PM
Subject: Re: [OT]Av Gas - Was Re: vapor lock revisited .... "winter gas"
> With all due respect, higher octane gas does not contain more power, it
> actually resists pre-ignition and detonation better. It burns more
slowly,
> thereby allowing you to run higher compression and more spark advance. It
> resists spontaneous "blowing up" and spot ignition (where some of the gas
> ignites ahead of the flame front), that leads to detonation. If your
engine
> does not require higher octane gas, using it is a waste of money!
> Greg Burrows
>
> Eric Frisbee wrote:
>
> > 100 Low Lead... my dad was a flight instructor and still an avid pilot.
> > Incidentally, a gallon or two of that in your roadster tank does
wonders!
> > :)
> >
> > Eric
> > ----- Original Message -----
> > From: Gary K. McCormick <svgkm@halley.ca.essd.northgrum.com>
> > To: <SPL311RDST@aol.com>; Datsun Roadster List
> > <datsun-roadsters@autox.team.net>
> > Sent: Wednesday, May 29, 2002 8:28 AM
> > Subject: [OT]Av Gas - Was Re: vapor lock revisited .... "winter gas"
> >
> > > I was at an airshow over the holiday weekend and was watching while
they
> > topped up the
> > > tanks in one of the aerobatic aircraft that was performing. I noticed
the
> > "100LL"
> > > designation on the fuel truck and was wondering - is that a
designation
> > along the lines of
> > > octane rating? And if so, what does that correspond to in octane?
> > >
> > > Gary McCormick
> > > San Jose, CA
> > >
> > > PS - When I raced motorcycles in high school (Sherman, set the wayback
> > machine for 19--...
> > > ) av gas from the pumps at the airport was the hot setup for the guys
> > looking for that
> > > little edge over the competition!
> > >
> > > SPL311RDST@aol.com wrote:
> > >
> > > > <snip>Also... if you do have a "seasonal" car and keep it
> > > > stored - try going w/ avgas- 100LL. <snip>
> > > >
> > > > Laurie :-)
> > > > 70 SPL311
> > > > AzROC
> > > > Chandler, AZ
> > >
> > > /// datsun-roadsters@autox.team.net mailing list
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> > > /// Send list postings to datsun-roadsters@autox.team.net
> >
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>
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