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RE: AVGAS to be phased out!

To: "MG List" <>
Subject: RE: AVGAS to be phased out!
From: Max Heim <>
Date: Thu, 27 May 1999 12:58:04 -0700
Umm, don't mean to contradict you, but unless you are 1) "knocking" or 
"pinging" on regular fuel (other than Avgas); 2) advancing your timing 
after you fill up with Avgas, and retarding it when you fill up with 
regular;  or 3) driving a modern car with computerized knock sensing and 
advance, there will not be any performance improvement in running higher 
octane fuel. Period. This has been stated in SAE literature, and was the 
subject of a class action suit in California against the oil companies. 
The companies were found guilty of deceptive advertising when their ads 
encouraged customers to buy their premium grades for "better 
performance". Basically, it was found that as long as you were running 
fuel of a high enough octane to avoid "pinging", a higher grade of fuel 
had no beneficial effect; unless, as I said, the computer sensor could 
then advance the timing to take advantage of it.

This perception of better performance is a fallacy encouraged by the oil 
companies, who are only interested in your money. Of course, if you 
retune your car each time you fill up to take advantage of the higher 
octane, then you would benefit. But who does?

Flame suit at the ready...

>> A number of individual States of Australia have already restricted or
>> banned this fuel for use on "public roads" under 'clean air'
>> legislation.  Whilst in many cases this mean that people racing on
>> tracks can still use it (for now) rally drivers who must travers 'public
>> roads' cannot!  I don't suppose that stockpiling fuel in the backyard is
>> an option but this is a pity because I have found that my little car
>> REALLY enjoys the occasional full tank of AVGAS and more frequently the
>> half/half mix.  I do notice the better performance (and besides... it
>> smells great :-)

>> Eric
>> '68MGB MkII


Max Heim
'66 MGB GHN3L76149
Runs great, 
looks particularly bad since some SUV clown backed into it.
If you're near Mountain View, CA,
it's the red one with the silver bootlid.

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