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bestclimb · 06-06-2011, 02:13 PM

NKG, Autolight, or Champion plugs are fine. Gapped properly they are about as good as you need. Don't bother with any multi electrode plugs as the spark will just take the path of least resistance anyway. I wonder if the claims of improved performance/MPG is from a "better plug" or from replacing a worn out component with a new one. If you are not going with high compression/forced induction the increase in spark will make a negligible change in performance. To get a much better spark you would really need to start back at the coil

I would pull the cap and rotor and inspect for corrosion or burning. If most of the metal is there clean it up with a copper wire brush and reassemble.

06-06-2011, 02:13 PM	#2 (permalink)
bestclimb Smeghead Join Date: Oct 2009 Location: South Central AK Posts: 933 escort - '99 ford escort sport 90 day: 42.38 mpg (US) scoobaru - '02 Subaru Forester s 90 day: 28.65 mpg (US) Thanks: 32 Thanked 146 Times in 97 Posts	NKG, Autolight, or Champion plugs are fine. Gapped properly they are about as good as you need. Don't bother with any multi electrode plugs as the spark will just take the path of least resistance anyway. I wonder if the claims of improved performance/MPG is from a "better plug" or from replacing a worn out component with a new one. If you are not going with high compression/forced induction the increase in spark will make a negligible change in performance. To get a much better spark you would really need to start back at the coil I would pull the cap and rotor and inspect for corrosion or burning. If most of the metal is there clean it up with a copper wire brush and reassemble. __________________ Learn from the mistakes of others, that way when you mess up you can do so in new and interesting ways. One mile of road will take you one mile, one mile of runway can take you around the world.