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All the car makers spend millions of dollars designing and testing engines. They usually recommend their brand of spark plugs. That should be enough evidence of what spark plug to run in any engine.
I use whatever I can get my hands on and won't make my wallet want to run away from me.
IMPO, spark plugs are really all the same... if they're making a spark, they're doing their job. I'm not paying out $10 per plug just cause it says "efficient" on the packaging...
This Hennessey Takes the Expedition Tremor's Off-Roading Capability to the Next Level
Slideshow: The VelociRaptor Expedition gains a lift, upgraded suspension, Brembo brakes, and trail-ready equipment while retaining the stock 440-horsepower EcoBoost V6.
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Slideshow: Called the Fortress, the 850-horsepower pickup combines Raptor underpinnings with military-inspired features, survival equipment, and a starting price of $285,000.