Therefore, manufacturers are constantly working on this element, improving it. (w/out the posted paper work to prove otherwise) Thank you and have a good day. Still have questions? Platnum plugs are good for about 50,000 miles. Maybe if there was a large movement to Ruthenium plugs I'd jump on the train. You can now save your money and even protect your environment. They don't provide extra power, torque or sex appeal. the engine doesn't know the difference and doesn't care as long as there's a spark at the right time and space for ignition. Peugeot 207 2012 1.4 petrol fuel pump constantly running? And the standard copper plugs give them all the performance that's possible. 2005 Grand Caravan? Platinums should be changed every 60,000 compared to Iridiums at 100,000 miles. Electrodes Made of Platinum or Iridium: OEM Mazda spark plugs have a platinum tip with a lifetime rating to 90k miles, or an iridium tip with lifetime rating of 120k miles. Go with the platinums. Being able to run hotter without igniting the mixture allows the spark plug to be self-cleaning. It is not advisable to leave the spark plugs in any engine for 100K since you may not get the plugs out of the cylinder head after this length of service and time. They are a bit expensive compared to the rest of the spark plugs but are worth it. What you can gain is a longer interval between plug changes. "-thus saith my butt-dyno. I had the original plugs in it for 7000 miles and never had any noticeable misfires. The reason why the other metals are used is because they have a longer service life and can easily go 100,000 miles unlike the coppers which are recommended for about 30,000 miles. Why does my 2005 Jeep Grand Cherokee keep needing to be jumped? Platinum, yttrium and iridium spark plugs are more expensive than copper spark plugs, but these premium coatings provide much better wear resistance. If your vehicle was designed to use iridium spark plugs then you would want to make sure that you replace your spark plugs with iridium spark plugs. i could get 4 spark plugs for the following prices: NGK V-Power $5.73 (a step up from OEM) NGK G-Power $6.60 (platinum tip) NGK Iridium iX $11.00 (iridium tip) is platinum or iridium spark plugs really worth the difference? Platinum is precious enough, but iridium is even more precious, which is why it is hard to find a single platinum plug for much under $6-$8 and an iridium plug for under $12-$14. Iridium spark plugs cost around eight bucks to fifteen bucks. All my vehicles are Japanese and I run a typical NGK plug and change them once every three years. Why are most auto shops open Monday through Friday from 8-5? What type car uses Sylvania 1157 LL light bulbs? Is it worth the investment? If you are going to change your spark plugs, pay the extra couple bucks and get the Iridium plugs- its worth … One thing is that a fine sharp edge takes less energy to jump the gap. Get your answers by asking now. Iridium spark plugs are worth the money. Because not only these plugs help in reducing the fuel expense, it will also reduce greenhouse gas emissions. I've never had a reason to stray from OE. Iridium spark plugs have a much finer center electrode. For cars where it's easy to do them, no need to waste the extra money on the ruthenium But yes Iridium is far Superior. 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