![]() And as these are newer spark plugs compared to each other, they are also quite fuel-efficient. In other cases, the igniting ability of the two spark plugs also differs in some slight modifications. In terms of designs, the Iridium has one design only and the Ruthenium has 2. In terms of long-lasting service and durability, the Iridium spark plugs give it a huge advantage. In general, they have some definite differences. NGK should be your choice if you want a stable, long-lasting performance at a lower cost.In general terms, the NGK iridium and the Ruthenium are spark plugs for cars and automobiles. In this choice between Denso vs NGK, you can choose Denso if you care about the horsepower of your vehicle, though it is only a fraction of a percent of the increase of power. ![]() To conclude, having highlighted my experience above, note that both Denso and NGK plugs work well with all types of vehicles – from light cars to heavy-duty pickup trucks. Their Laser Iridium’s do not have issues with the ground electrode, and the whole plug has an advanced design.īoth NGK and Denso now have a twin tip iridium design, which is interesting, but I haven’t seen enough testing or reviews to think that they could be any better than the laser iridium design. The NGK laser Iridium is miles ahead of both the Iridium IX and the Denso iridium power. This is finest plug in the NGK collection and maybe the absolute best plug out there. On the other hand, I just purchased a brand new set of 8 NGK LASER iridium plugs. Denso iridium power, however, do not have this problem. This is probably due to a hotter, more concentrated spark. It’s the ground electrode you need to worry about and I’ve personally noticed the spark from the Iridium IX tip cause severe erosion to the ground electrode (strap electrode), necessitating a re-gap after only five to ten thousand miles. The varying size of the center electrode has almost no effect on longevity since it’s made of iridium alloy. The problem with the NGK’s is that the ground electrode erodes very rapidly compared to the Denso’s (That is, unless NGK has fixed that in recent years). I have noted that NGK Iridium IX does not last longer as compared to Denso Iridium Power. They also need less maintenance as checking their condition at every 3 to 6 months is enough. Unlike the platinum models, they are stable, don’t grow a gap over time, and don’t create extra stress on the ignition system. They are also a better option than platinum plugs in terms of consistency and longevity. A copper plug lasts for around 20,000 miles, but you will be surprised that the average lifespan of an iridium plug is 40,000 – 60,000 miles. Iridium spark plugs are not the best in terms of performance but nothing can beat their longevity. It is also 4-5 times costlier than platinum. The metal is much less conductive than copper but lasts longer and works at a low temperature. But, which one between Denso vs NGK would you prefer?īoth types are iridium spark plugs. Both work well with all types of vehicles. Two of the most popular models are Denso and NGK. There are a couple of spark plug models in the market. ![]() For full performance and excitement, your car needs good-quality spark plugs to run the engine. Spark plugs are a crucial component in the mechanism of the automobiles.
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