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MG MGF Technical - spark plug colour


Yesterday I was checking the sparkplugs because of the lack of power of my VVC (thread K&N in fog).
I thought that the plugs should have a light-brownish colour, but my plugs had a sort of yellowish-green colour, like sulpher. Is this normal?

The last two months I'm driving with Shell Pura instead of Euro 95 petrol, could this be the reason for the different colour?

I don't know if you guy's know Shell Pura in Britain but here in Holland it's a sort of "cleaner" petrol, it makes the engine run smoother, with less pollution. Maybe it's named different overthere.

A question for Roger P. maybe?


Have a look at this site.



This thread was discussed between 12/01/2001 and 13/01/2001

MG MGF Technical index

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