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As you may already have figured out, platinum plugs use platinum while iridium plugs use iridium for the tip of the center electrode. 3.Iridium plugs are stronger than platinum plugs 2.Iridium plugs have a higher melting point than platinum plugs Use anti seize Bob. Iridium is a metal that is harder and more durable than platinum. Another advantage of iridium over platinum is strength, with over 8 times the strength of the later. 1.Iridium and platinum spark plugs have different center electrodes The majority of spark plugs feature a copper-core center electrode. There must be some benefit gained by the Irdium series of spark plugs, since so many are supplied OEM on the vast majority of new cars(requiring an initial plug last ~ 100K miles). Your email address will not be published. Iridium is said to be six times harder and eight times stronger than platinum with a 700° higher melting point. I’ve had my plugs in my 5.9 Durango for over 100,000 miles and they came out like butter. Over time, this wear leads to the spark plugs fouling and not working as efficiently as they did when they were new. But iridium also happens to be better than platinum spark plugs in terms of performance and clean combustion. If you are considering either as a replacement, the iridium plug is probably better since you do not have to change as often and you do not have to worry about the electrode prematurely eroding inside the combustion chamber and possibly leaving harmful deposits. A single platinum spark plug is similar to a copper/nickel spark plug, … The main property of the iridium spark plug is that this electrode material for spark plugs has a high melting point. Iridium Spark Plugs have some significant advantages over spark plugs made using other metals. Iridium IX ® vs. OE Iridium Spark Plugs. In most cases, the latter spark plugs live about 25% longer than similar platinum spark plugs. To find out the recommended spark plugs for your specific vehicle, check your owner’s manual. Car now diagnosed after install of platinum plugs and all stats are nearly within specs of a new engine. Under no circumstances will we be liable for any loss or damage caused by your reliance on any content. It would be more difficult if you do it yourself or more costly if you have it done in a shop. Platinum may be harder than copper, but iridium is the hardest among the three, and iridium spark plugs outlast platinum spark plugs by almost twice the mileage. There is a price for this precious metal. Aside from the very common copper spark plugs, there are two other options for most users; platinum and iridium plugs. Platinum plugs deliver enhanced performance and fuel efficiency compared to copper plugs, but for a considerably cheaper price than iridium spark plugs. Around that rod is wrapped a ceramic insulator, and around that a metal case. Since platinum is harder, it holds its sharp edge much longer than a conventional spark plug, up to 100,000 miles. I have a 2008 kia spectra with 134,500mi and had the plugs changed at 106,000mi. Without spark plugs, your car will not start. Learn more about quality spark plugs, find your car part, or find where to buy your auto part today. Had everything in the motor diagnosed. Since iridium is expensive, iridium spark plug manufacturers reduce the diameter of the central electrode to 0.4 mm. Manufacturers use precious and other metals in the center and side electrodes of a spark plug. We encourage you to consult with a certified technician or mechanic if you have specific questions or concerns relating to any of the topics covered herein. The spark fires the air and fuel mixture within the engine and creates the combustion that powers your car. A platinum spark plug is expected to last for 60 thousand miles before needing replacement while an iridium spark plug can go for 100 thousand miles or even more. The price is another major difference when you compare Iridium vs Platinum spark plug. The cost of the plug many not be such a significant argument, but the actual replacement can be an issue for some vehicles. Iridium Spark Plugs. {{lede.date | date:'dd-MMM-yyyy'}}{{lede.tags.length > 0 && lede.date ? ' Thanks to its strength, iridium spark plugs can last up to 25% longer than comparable platinum spark plugs. Iridium plugs are even longer lasting than platinum. They feature a fine wire center electrode that is designed to conduct electric energy much better and increase firing efficiency. If you were to settle for copper or platinum spark plugs, then you might receive 50% of the lifespan when compared to iridium. Although you will have to pay more money for iridium spark plugs, you will get what you pay for. kescott1910. However, copper is soft and has a low melting point so it is always covered with a nickel alloy to protect it. Your email address will not be published. Changed over to platinum plugs and cold starts on first turn of key. | ' : ''}}{{lede.tags.join(', ')}}, Back to Basic Car Maintenance & Repair Articles. ACDelco 41-993 Professional Iridium Spark Plug. The plugs are suitable for car owners with electronic distribution systems. I change my plugs every 50,000 and have had no problems. The use of metals like nickel alloy, platinum and iridium reduces the wear caused by high voltage sparks. G-Power ®. In reality, copper has the best performance of … Trav is right about the single vs double precious metals. With iridium plugs I had to repeatedly turn the key 5 to 11 times before the engine would start and run. Privacy Policy | Ad Choices | Terms of Use | See official rules for restrictions and complete contest details. One of the mechanics asked me to change my Iridium Sparkplugs, which is the stock one to Platinum as it gives better mileage and performance. A platinum disc is melted on the tip, which makes the plugs resistant to deposits. Positive energy traveling through the wire from the coil jumps the gap between the tip of the wire and the metal case, which g… Iridium spark plugs have extremely fine electrodes while retaining excellent wear characteristics. Both types have the very same parts and construction, the only difference between iridium and platinum spark plugs is the metal used for the center electrode. Required fields are marked *, Notify me of followup comments via e-mail, May 23, 2011 • 5 comments. Platinum spark plugs The platinum plugs last longer than the copper plugs, but not as long as the iridium plugs. The metal channels the high voltage from the spark plug wire through the spark plug so it can spark when it goes across the small gap between the central electrode and the side electrode. Iridium plugs cost more than platinum plugs, partly because iridium is a rarer metal than platinum, but also because it offers several advantages. Longevity is a key advantage of platinum spark plugs. Got 91,000 miles out of champion copper core plugs 16 of them on a 04 ram hemi engine also use antiseize, i didnt on first replacement at 65,000 and those plugs came out but some of them were difficult so the antiseize went on new champion copper core plugs today, truck pulls like it supposed to and runs supremely easy very light throttle maintains speed 70 mph nothing to it, just needs some paint and keep on truckin! Iridium Spark Plugs You must have guessed that iridium is harder than platinum. Copper is an excellent conductor of electricity – better than any other type of material used in spark plugs – and also transfers heat faster. These metals also help extend the interval between spark plug changes and decrease the misfire rate. Now at about 134k no the plugs are trashed. Iridium Racing Plugs Denso iridium racing plugs and some NGK iridium racing plugs have iridium center and a platinum ground electrodes. A standard spark plug typically features a nickel-alloy outer material fused to the copper-core electrodes. This is the vital spark that starts the combustion process. The move to iridium plugs could potentially be a performance advantage. All plugs should perform the same when they are newly installed. Iridium spark plugs have extremely fine electrodes while retaining excellent wear characteristics. Iridium is harder, more durable, and more costly since you will be paying for the longer lifespan, and you will not have to replace the spark plugs as much as other options, like copper. Apparently in some cases iridium plugs are not always better. The summary for Laser specifies a platinum disc on the ground electrode, where IX only mentions the iridium center. These plugs might be the pre-eminent spark plugs in the market, but these are highly expensive too. NGK builds two types of iridium spark plugs: OE Iridium and Iridium IX ®. Difference in performance would be relatively small if any between iridium and platinum spark plugs. Iridium spark plugs and Platinum spark plugs are pretty similar in their overall design but they have one key difference which is the material the tip is made of. You can also consult your mechanic for guidance on selecting the best spark plug for your car. 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