Thread: Spark plugs
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Old 01-25-2003, 01:34 PM
Berolina Berolina is offline
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Join Date: Feb 2002
Location: Osoyoos, British Cumbia
Posts: 21
Spark plugs

I want to change the plugs in my 1987 - 420SEL. Th book calls for W8 plugs, but I presently have W9 plugs installed. What is the difference between the two and what are the advantages of one over the other?

1987 420SEL
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