Re: Any problems with new oxygenated gas?

[John Greenstreet <jgreenst@motown.ge.com>]

> From quattro-owner@swiss.ans.net Tue Dec 13 10:50:21 1994
> Date: Tue, 13 Dec 1994 10:08:44 -0500
> From: Nick Craft <ncc@scr.siemens.com>
> To: quattro@swiss.ans.net
> Subject: Re: Any problems with new oxygenated gas?
> Reply-To: quattro@swiss.ans.net
> 
> Makes my 87 5000S ping (pink for UK readers) like crazy.
> Also lose about 10% gas mileage. Switching to premium gasoline
> makes absolutely no difference.
> 
> Anybody care to speculate on whether retarding the ignition
> timing during the winter would help stop the pinging?

If the noise is in fact due to pre-detonation (pinging), retarding the
timing will definitely stop it.  Pre-detonation is not usually a
problem in the winter, so I wonder if that's what you're really
hearing.  I would suspect the real problem is lifter noise.

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John Greenstreet, Senior Engineer           (jgreenst@motown.ge.com)
Martin Marietta Government Electronic Systems    Moorestown NJ 08057
WPI Class of '75, Temple Class of '94

My new car history:
  1975    1978    1982       1986        1989      1992      1995
   VW ->  Audi -> Audi  -> Mercedes -> Mercedes -> Audi -> Mercedes
Scirocco Fox GTI  4000S    190E 2.3    190E 2.6    100CS     S320

POSSLQ's* new car history:
         1978       1981       1985      1988        1990     1993
       Triumph ->  Toyota ->  Toyota  ->  VW    ->   Audi  -> Audi
       Spitfire    Tercel     Corolla   Jetta GL      80      90S

*POSSLQ = Person of Opposite Sex Sharing Living Quarters
Note: All Audis and Mercedes above were sold to friends or family.
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