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From: wanttaja@ssc-vax.UUCP (Ronald J Wanttaja)
Newsgroups: net.auto,net.consumers
Subject: Re: No Leaded Gas -- Now What? (aviation fuel)
Message-ID: <498@ssc-vax.UUCP>
Date: Fri, 8-Mar-85 11:58:55 EST
Article-I.D.: ssc-vax.498
Posted: Fri Mar  8 11:58:55 1985
Date-Received: Sun, 10-Mar-85 05:37:31 EST
References: <673@druxx.UUCP> <1349@hou4b.UUCP>
Organization: Boeing Aerospace Co., Seattle, WA
Lines: 25
Xref: watmath net.auto:6012 net.consumers:1953

> Your friend who buys 100 octane leaded gasoline at the airport will
> find that leaded aviation fuel is also being phased out.  Most
> airports now only carry what is called 100-LL or Low-Lead.  It has
> about 10% of the lead contained in standard 100-grade Av-gas.  This
> is causing problems with older airplane engines.  I guess Low Lead
> is better than no-lead if you need it, however.  Incidentally,
> 100-LL costs about $2.00 per gallon in the Northeast.
> 

The 100 octane low-lead (100LL) was originally designed to be used in
airplanes which required 80 octane leaded fuel... which was being phased
out by major fuel refiners.  I don't believe it was intended to be used
in those A/C engines which require 100 oct. leaded fuel.  In itself,
100LL is NOTORIOUS for causing lead problems in the older (80 octane
burning) engines.  It's not as bad as the leaded variety, but even engines
designed to operate on the 100LL have problems (the Cessna 152, for instance).
There has been a reverse in the decline of 80 octane, it's readily available
at most airports.  However, I would agree that auto engines designed to run
on premium leaded could probably take 100LL with no lead problems.  

					Ron Wanttaja
					(ssc-vax!wanttaja)

Don't tell me not to burn the candle at
both ends; tell me where to find more wax!