SPARK PLUG Change Interval:
Fellow NAS D90 V8 Owners:
I'm wondering how often you guys have to change out your Spark Plugs ??...
Although my D90 runs great, it seems that about every 6 months I pull the plugs and the beast has made them black... Still starts & runs great, but when I change them out it runs so much bettah. I have the best luck with Champion Gold Truck Plugs.
Just wondering if others experience this.
Only takes me about an hour to change them out and maybe $20, so it's not a huge deal.
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