Odd spark plug colour

[Robert Mangas]

  Fuel additives will often impart an odd color to plugs; I pulled a set 
once that were green, which kind of freaked me out.

>From: <iain.atkinson at tesco.net>
>To: quattro at audifans.com
>Subject: Odd spark plug colour
>Date: Tue, 27 Jan 2004 15:00:20 +0000
>
>Pulled the plugs on the 90 20v today (7a eng code) just to have a look at 
>the condition been in now for 20k miles. The colour was an orange colour 
>almost like rust, never seen this before just wondered if anyone out there 
>has any kind of explanation. I do use an ocatane booster in the fuel but 
>can't believe it's that. Car runs fine.
>
>
>Iain
>
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