The Truth About 10 Popular Spark Plug Brands

5. Autolite – The All-Rounder

Autolite has been around since the 1930s and offers a wide range of plugs for cars, motorcycles, even lawnmowers. Their Iridium XP line is especially popular, with over 1,700 positive reviews on Amazon. With plugs available at nearly every auto parts store, Autolite is a dependable mid-range option for most drivers.