Standard spark plug gaps will wear much faster. The electrode gap normally increases from spark firing and this happens faster with standard plugs. Iridium plug gaps wear more slowly so they will last 100K miles or a little more. Regular plugs will wear out in 15K miles and platinum plugs wear out in 30-50K miles.
Large gaps require higher voltage from your ignition system but that means you will likely have failing coils or other intermittent problems. Even engine ECUs can be damaged by excessive spark plug gaps. So use iridium plugs if specified for your car and change them at intervals recommended in your owners manual. Usually about 100K miles.
What about iridium spark plugs?
Iridium is said to be six times harder and eight times stronger than platinum with a 700° higher melting point. Iridium spark plugs have extremely fine electrodes while retaining excellent wear characteristics. Thanks to its strength, iridium spark plugs can last up to 25% longer than comparable platinum spark plugs.
Iridium spark plugs feature a fine wire center electrode that is designed to conduct electrical energy better and increase firing efficiency.
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Негізгі бет NGK Iridium Plug vs Simple Spark Plug Difference - CD 70 - YBR 125 - Honda 125 | | EP #1
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