Iridium and platinum plugs can go 40,000 to 50,000 miles easily, and cost more for that reason. So a plug can be copper and platinum. NGK Laser Iridium Spark Plugs have iridium center and a platinum ground electrodes. It is when you're dealing with high engine temp, coolant leaking, that makes you realize, you don't need the top of the performance stuff. Platinum and iridium in spark plugs increase longevity, at some cost to conducting efficiency. The stock plug is NGK MR7F, but can not find any info for an upgrade, most just show the stock listing. As such, iridium tips can be made much thinner than platinum to concentrate the spark energy without melting. If installed in a regular engine, they would likely last longer than most people keep their car (barring any motor problems that can cause premature plug death). A larger gap then requires a higher voltage. Having said that, a fouled up spark plug will give you much worse mpg. Those plugs have a much higher melting point so it doesn't erode and keeps a nice sharp edge. You can find spark plugs in a variety of different metal combinations, including aluminum spark plugs, iridium plugs, platinum and more. Typically we have found you can expect 50-80k miles on a traditional iridium plug. If you have high-performance iridium or platinum plugs, they can often go 100,000 miles before they need a change; but it's important to find out for sure before you assume this. Has anyone replaced the stock NGK spark plugs on your Scout, with a platinum or iridium spark plugs? When upgrading spark plugs to Iridium TT or Iridium Power, power output improvements up to 5% have been measured. When it gets too large, the plug misfires. Still you might want to ask around the service stations, whether someone collects them for bulk processing, and toss yours in their pile. When upgrading the spark plugs, the interval may change. The 7Es should be changed every 10,000 miles to be conservative, but provide a superb spark for my engine type (and are very easy on the wallet). The standard plugs are already a performance or enhanced design. Driving on LPG or CNG will reduce the lifetime of a spark plug by 25-30%. IX is a cheaper alternative that won't last as long. These plugs will last a long time and do the job with no ill effects. This may not seem like an important consideration, but install a standard reach small-block Chevy plug (like the one you can barely see here) into a longer-reach chamber like this iron Vortec head and the spark … This applies to the double-platinum, if your car manual recommends them, do not downgrade to single platinum or copper, but you may use the iridium spark plugs. Iridium spark plugs; Platinum spark plugs; Double platinum spark plugs; Copper Core Spark plugs. ... NGK LFR6AIX-11 Iridium IX Spark Plug Denso PK20TT Platinum TT Spark Plug. However, when you add a high power ignition system (such as those offered by MSD, Crane, Nology) you can open the gap from .002-.005″. My question is, do you guys think it can be my spark plugs that are causing fuel consumption issue? And in that research you come across something called “Iridium” spark plugs and you think, “wow! All spark plugs wear out at their tips. Some who knows plugs should be able to get it right. Its OE legacy, unsurpassed quality and leading vehicles in operation coverage reinforces NGK as The Ignition Specialist™. Iridium spark plugs: these spark plugs are usually manufactured with ‘fine wire’ centres and 4 mm electrodes. Iridium Plugs. Iridium is even harder than platinum, which means the life of these plugs will outlast the rest. i used to spend a lot of time, energy and money on "enhanced" performance stuff, like iridium, platinum plug, redline water wetter, the best synthetic oil, etc. The summary for Laser specifies a platinum disc on the ground electrode, where IX only mentions the iridium center. NGK doesn’t even make a plug for that engine. The main difference is the material that the 'tip' of the spark plug is made of - normal ones are usually copper, whereas the other two have tips made out of platinum or iridium. Iridium plugs can last longer than non-iridium due to their metallurgical properties associated with electricity. Typically we have found you can expect 60,000 to 80,000 miles on an unaltered motor. Per NGK, G-Power Platinum plugs are good for 60K km, Iridium IX 100K km, and Iridium Laser 120K km. G-Power ®. They are also the longest conductors and works well if you don’t really travel that much. A spark plug’s reach is defined as the length of the threads. My wifes Lexus…the ONLY plug available is the Iridium from Denso. Spark plugs are made of different types of materials. If so, what did you use with part number. G-Power Platinum Alloy Spark Plugs offer superior performance with improved fuel efficiency, lower emissions, and quicker starts; 0.6mm laser welded fine Platinum tip reduces required voltage ensuring high durability and a consistently stable spark Optimizing the Plugs To really take advantage of your expensive performance plugs, you may need to adjust ignition timing or spark plug gap. Because i have read at alot of places that rotator type hard wire thingy cleaning can totally destroy the platinum or iridium spark plugs. Spark plug gaps can be checked and maintained with a spark plug gap tool, and we’ve got you covered on that too. A pair of spark plug gapping pliers is by far the safest way to gap plugs, no matter if they’re Iridium, Platinum, or copper core. 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