How to find the correct plugs for your car ?
『Installment Size』
The plugs can fit your car or not . First of all, Only correct thread size can fit into your engine. Secondly, thread reach should match original length, if too long , plugs will hit the engine piston, if too short, the sparking can not reach the correct position inside engine. For hexagon size and seat type , please choose the same with the original one.
『Heat Rang』
Depend on different OEM maker , the index of heat range is different. Torch is from 2 to 10 , the higher number, the colder heat range. Let’s say, cold plugs like the ice cream. you will eat ice cream during summer time. so cold plugs are used for hot weather regions or easy to overheat engine , example, turbo engine or tuned or modified vehicles. On the other hand, hot plugs , just like hot coffee, we drink hot coffee during winter , and use hot plugs in cold area , so that can keep the engine running even during cold environment。
『Electrode Gap』
The Gap between ground electrode and central electrode will decide the sparking flame big or small. the bigger gap, the bigger flame. But the bigger dose not mean the better. everything depend on the original engine design. the new generation engine equipped with fuel injection system, easily mix the air and gasoline , small sparking can easily ignite the engine. small gap , stable sparking is perfect. so the new general engine normally equipped with Platinum or Iridium plugs, small gap which requires low voltage of electricity . On the other hand, for the old generation engine , it requires bigger sparking flame , require for high voltage ignition system. normally use Copper-Nickel plugs. Please always choose the spark plugs which match original engine requirement.
『Electrode Materilas』
Hardness: Copper < Platinum < Iridium
Cost : Copper < Platinum < Iridium
Iridium and Platinum have better durability, copper plugs suggested replace milage is 15,000~20,000Km, and Platinum normally is 50,000Km, Iridium can reach 100,000Km above.
