This NGK Spark Plug comes in a pack of 4 and is a good value. It features a trapezoid-cut ground electrode that reduces quenching. This spark plug will last you up to 40,000 miles.

Looking at the new NGK spark plug, it's easy to see the superfine ruthenium-allow electrode. ... FoMoCo scraped off the NGK parts—oh, and the one NGK coil pack that left it in place.