I'd use iridiums there in a heartbeat just in the hope they last long enough that I basically never would have to mess with them.īut in your regular car, use copper, or regular platinum.the rest are kinda the grey area where you get played a bit for nothing really measurable.Ĭars that use waste-spark ignition, or other applications where the spark goes the opposite way of usual can benefit from double-platinum plugs. I think iridium plugs are sort of insane, *UNLESS* you have some car with an absolutely tedious and god ridiculous spark plug changing procedure.some cars require you to almost remove the engine to change plugs. Over time they realized that platinum is a harder metal than copper so they started making spark plugs with platinum. 4) Spark plug manufacturers do not recommend the use of nitrous. When spark plugs were first invented they used copper on the tips of the spark plugs. Bosch could do other things to the platinum like copper core electrode (all NGK have copper cores) 3) According to the documents Ive seen floating around Iridium lasts longer. That is great, but the plain ground electrode is so huge compared to the active electrode its enormously unlikely to burn out to any measurable amount. Iridium is up to six times harder than platinum so Iridium should hold up longer when used on your spark plugs. This item: NGK 6994 Laser Iridium Spark Plug - IZFR6K11, 1 Pack. They also have a 700 degree higher melting point and are six times harder. If you really are bothered by changing plugs and don't want copper, I say just go platinum, as a lot of cars have them anyhow.ĭouble platinum just puts platinum on the ground electrode. Do iridium spark plugs make a differenceIridium 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. Iridium spark plugs are eight times stronger than platinum spark plugs. Platinum spark plugs last anywhere from 20,000 miles to 60,000 miles before needing to be replaced. Platinum may not be as durable as iridium, but it is a lot more durable than the standard copper spark plugs which tend to go bad very quickly. For what its worth even single platinum plugs will last immensely long. If you want a cheaper alternative to the iridium spark plugs, then go with the platinum spark plugs.
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