Sound a bit weird to me. In fact sounds like a spoof. Ever heard of aircraft
using LOWER octanne fuel, quite the opposite?
For a given normally aspirated engine, the peak compression pressures will
be a bit low, granted, but this is not the only reason for detonation, it
being (like most things engineering) a very complicated business, indeed -
read anything Ricardo related - a giant among motor engineers.

And what if you drive into Colorado in  a turbo or supercharged car? If a
manufacturer states 95, 93, 91 minimum octane rating, that's generally what
they mean.

My DJ would have a problem on Super Colorado!

Clive Smith
'88 Syncro Transporter (DJ 2.1)

----- Original Message -----
From: "Richard A. Jones" <Jones@COLORADO.EDU>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Thursday, July 11, 2002 5:52 PM
Subject: Re: 85 octane in Colorado

> > I do have one peeve. What's with the garbage gas in Colorado? "Regular"
is 85 octane. Plus
> > is what I consider normal for regular at 87 octace. Super is 91, mostly
(if available). Get
> > me back to a civililzed state and decent gas!
>
>
> Kim:
>
> I'm enjoying the story of your trip, but our gas in Colorado isn't
> garbage.  The
> octane is reduced because of the altitude, since the oxygen is reduced.
> I won't
> comment on our level of civilization.  ;-)
>
>                                           Richard A. Jones
>                                           Boulder, Colorado
>                                           '81 Vanagon   Mr Bus
>                                           '87 Syncro Westy   El Jefe