Thread: Replaced Spark Plugs...and wow!! what a difference!
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  #11  
Old 07-11-2005, 01:21 PM
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Mike Murrell Mike Murrell is offline
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I agree with Duke's last comment...H9DCO vs. H9DC.

I've used both and actually got better gas mileage and a smoother idle with the cheaper H9DC.
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Mike Murrell
1991 300-SEL - Model 126
M103 - SOHC
"Fräulein"
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