Miata Mailing List: September 1993, Message #133
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   From: MANSON@fsd.com
Subject: Re: Catalytic Converter Failure
   Date: Fri, 17 Sep 1993 07:52:37 -0400

On 15 Sept Andy Poling wrote:
"...my family lost two catalytic converters, apparently because of Shell gas."

This sounds like the old scare distributed when the changeover to unleaded
fuel was being introduced.  I recall that the story was that if you burned
leaded fuel in a vehicle with a Cat conv., it would clog the converter.  I
assume that the threat was real, although I have no personal experience or
(as yet) know of anyone who has.  I can imagine very easily though a gas
station attendant or even a manager putting the wrong gas in the wrong tank.
The users were prevented from misapplication by the difference in the size of
the fuel pump nozzles, although I also seem to remember devices put on the
market to defeat this difference by means of a nozzle adapter.

Any chance this was the cause Andy?

Tom
Manson@fsd.com