We Tested 7 Cheap Spark Plugs Against NGK & Denso — 3 Are Robbing You Blind

We Tested 7 Cheap Spark Plugs Against NGK & Denso — 3 Are Robbing You Blind Not all spark plugs deliver the same performance—and choosing a cheap plug simply because it costs less could end up costing you more in the long run. In this video, we put 7 budget-friendly spark plugs head-to-head with trusted NGK and Denso plugs to see which ones actually deserve a place in your engine. We'll compare spark quality, electrode design, gap accuracy, construction, materials, heat range, resistance, and overall value to find out where the cheaper alternatives save money—and where they cut corners. NGK notes that an incorrect spark-plug gap can contribute to misfires, power loss, poor fuel economy, fouling, and accelerated plug wear. We'll also explain why heat range, reach, electrode design, and the correct application matter far more than simply choosing the cheapest plug on the shelf. Denso's specifications show that spark plugs differ significantly in construction and heat range, and the correct plug must match the vehicle's requirements. And there's another problem buyers need to know about: counterfeit spark plugs. NGK and Denso have both warned about fake products that can have incorrect construction or specifications, with counterfeit plugs potentially causing serious engine damage. If you're replacing your spark plugs, don't assume the most expensive option is automatically the best—or that every cheap plug is a bargain. This test reveals which plugs are worth your money, which ones aren't, and what you should check before installing a new set. 👍 Enjoyed the video? Like, subscribe, and turn on notifications for more automotive guides, product comparisons, maintenance tips, and money-saving car advice. #SparkPlugs #NGK #Denso #CarMaintenance #SparkPlugTest #AutomotiveTips #EngineCare #CarTips #AutoRepair #VehicleMaintenance Subscribe to Auto Care Lab for real car tests, oil analysis & maintenance truth 👉    / @autocarelab