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Spark plugs: How do they work, and what's their lifespan?
What you need to know about spark plugs
Spark Plug: Construction, Working and Some Simple Maintenance Tips
Spark plugs in a car: what you need to know, mycar advice and insights
Spark plug guide: how do they work?
Copper & Iridium vs Platinum Spark Plugs
Here's How Your Car's Engine Works
Spark and Ignition, Basic Knowledge, SPARK PLUG, Automotive Service Parts and Accessories
Is it true that Iridium sparkplugs will give your car more power? Or are copper sparkplugs enough?