Spark plugs: Copper vs. I got 9 years and nearly 100k mikes (bought in 07 with appx 95k, traded it in at 180k) with zero plug issues. Bosch plugs don't always seem to let our Jeeps run 100% perfectly, a Bosch engineer once opined on a Jeep forum it's due to their more limited assortment of heat ranges when compared to Champion, Autolite, and NGK. The truth is that these fine-wire spark plugs are an outstanding choice for a performance street car. I can't really say how they work in a car, since I've only tried them in motorcycles. However, the overall longevity of these two types of metal is better than copper plugs. Are iridium plugs really worth the cost? The truth is that these fine-wire spark plugs are an outstanding choice for a performance street car. Performance isn't as incredible. Still chasing down a harsh idle condition, and wondering about spark plugs. the only difference will be longevity of the plugs themselves. Adjustable vs. fixed gap. I wouldn't leave plugs in 100k no matter what they say the double plat can go. Copper steamrolls over iridium and platinum in these areas, but it suffers from a significant drawback: Copper spark plugs die out way faster than the other two types. Spark plugs: Copper vs. They looked like new. Gap was the same as the spec for the new ones. Performance isn't as incredible. Platinum-made spark plugs go a little longer than copper plugs but do not touch 25,000 miles. Regarding copper spark plugs: there is a copper center electrode core in every spark plug, whether it's "copper" or precious metal. These spark plugs have a small center electrode which requires less voltage to generate a spark. Edit: if I recall iridium is actually "better" than platinum in terms of its longevity as the center electrode is stronger. The only bikes i would bother changing plug grades on are racing 2 strokes. 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. There is little I can find about Ruthenium spark plugs, except it's the new sliced bread, better, last longer, etc etc. Follow your owners manual on this one. I put Bosch double Iridium plugs in about a year ago. Copper spark plugs are better for old (up to 1980's) cars with low voltage distributor based on ignition systems. To think a spark plugs is a spark plug is like saying "motor oil is motor oil" Technology advancements can occur at every level. Iridium spark plugs are not the best in terms of performance but nothing can beat their longevity. I'd say it's the finest spark plug I've ever used. They feature a fine wire center electrode that is designed to conduct electric energy much better and increase firing efficiency. Just use the stock plug. I couldn't find much on the internet. 2. Copper Core. “As an example, an Autolite copper 105 versus an XP Iridium 105 will have identical ceramic temperatures and the carbon burn off will be the same,” says Reeves. No, following the appropriate change schedule, I believe 30k, though I did it more frequently, maybe 25k. 542 Posts . Iridium spark plugs feature a fine wire center electrode that is designed to conduct electrical energy better and increase firing efficiency. Both are iridium spark plugs and have a long lifespan. Every plug in the Laser Series was designed for an OEM application. Iridium spark plugs have extremely fine electrodes while retaining excellent wear characteristics. The fine wire spark plugs require less voltage to fire compared to the larger copper electrode, which makes things easier for the ignition system and allows for an increased plug gap to fatten up the spark … This means if durability is a quality that you’re looking for the most, then you won’t get it from platinum spark plugs. NGK builds two types of iridium spark plugs: OE Iridium and Iridium IX ®. The nickel alloy is also softer than platinum or iridium, so the sharp edge firing you get right out of the box tends to wear out quickly. List of the Disadvantages of Iridium Spark Plugs. I recently changed the plugs on my Ford Ranger with the original plugs in it at 139,000 miles. Remember, the smaller the diameter is , the lower the voltage is required to start a spark. NGK builds two types of iridium spark plugs: OE Iridium and Iridium IX®. I wouldn't leave plugs in 100k no matter what they say the double plat can go. A spark plug’s reach is defined as the length of the threads. Follow your owners manual on this one. Spark plugs rely on excellent electrical conductivity to help the spark maintain its energy and heat as it crosses the gap, and that means using a highly conductive metal like copper. One can debate whether iridium/platinum spark plugs improve the emissions/fuel economy but as far the performance is concerned, copper plugs are better in stock conditions. Relevance. Let’s start with the most common spark plug out there, the copper core. Pros and Cons: Iridium vs Platinum Spark Plug; 7 Symptoms of a Bad Spark Plug in Your Car; Copper Spark Plugs. Long story short, I bought 6 iridium spark plugs($31 aarrgg). Copper Spark Plugs. The more superior types of spark plugs feature platinum and iridium electrodes and are two to three times … Old copper plugs use a nickel electrode. The iridium plugs are a "cooler" temp plug, so when super charged, they resist pre detonation. I know the Iridium last a long time, but that really isn't an issue, plugs are cheap and easy to change. Use whatever the manual calls for unless you have a good reason to switch (like significant mods such as higher compression pistons, a turbo, or cams, not just exhaust and air filter). Keep in mind that copper spark plugs need to be changed every 20,000 miles. Naughtums. Could someone here help me out on this because if it is to give better mileage, I will go for it. YAMAHA XT600E SPARK PLUGS NGK Standard Copper Core : DPR8EA-9 Iridium : DPR8EIX-9 Gap on both has to be 0.9mm (GAP size directly from NGK website) Denso Standart: X24EPR-U9 Regular DENSO X24EPR-U9 (DPR8EA-9) - 420-01-601 - Online Moto Parts Iridium: IX24B Iridium DENSO IX24B (DPR8EIX-9) YAMAHA ×Ô 600 IRIDIUM - 420-01-820 - Vando Copper is for conducting heat. Twin Head Spark Plug … As for the 2.7, the ignition system is desigened to work best with the iridium plugs. Every plug, copper, iridium, platinum, unubtainium, etc., has a different resistance. "Copper" spark plugs are a bit of a misnomer these days. Let’s go over their pros and cons now. So, spark plug replacement time for the Mazda (2.3 engine). Many, many years ago, it was not the case that they … Considering the bike into which the plug is being screwed, it's doubtful any spark plug will get a chance to wear out. Iridium is 6x harder and 8x stronger than platinum, has a melting point 1,200°(F) higher, and conducts electricity better.. For many years, spark plug manufacturers favored platinum for their long life and performance plugs due to its high melting point. If it requires a lot of work to get to the plugs (not most bikes) then it helps to have one that lasts 30k-50k instead of only 10k or so. All dual precious metal plugs are designed to provide maximum longevity. I always ran Champion coppers in my 2000 TJ. A platinum or iridium spark plug will last you something like 80,000 to 100,000 kilometers. I had 10,000 miles on them. Platinum spark plugs also run a bit hotter, preventing spark plug deposit buildup and fouling. Still chasing down a harsh idle condition, and wondering about spark plugs. 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