My modern rides will give them a trial vs their OEM spec. I now discover they might be a better choice for us old wrenchers who care about every mile being “righteous” and love to get our hands dirty blacksmithing our rides. The Iridium’s are definitely better of the two, but vs old-school copper… don’t know. My modern cars have all OEM specced for Platinum and Iridium’s. From that experience I switched from my American plugs and have enjoyed using them in all my old machines, even lawn mowers, for decades. That was what you did then (and 10k was a lot more than 6k after all). Nothing comes close for solid performance and cold start ease and I didn’t mind swapping them every 10-12k. The U-grove plugs are still the best for my ancient 1978 Yamaha XS-650SE motorcycle (which I discovered a ways back are a copper core design). Then I got my 1970’s UJM (Universal Japanese Motorcycle) and found a more modern type that worked really well, like the Nippon Denso U-groves. Most plugs these days are extended tip and exceed our “stone knives and bear skins” era performance. They were so-so, though when the Champion extended tip “Y” series appeared, as in J12Y for my old 60’s Pontiacs, they seemed to make a real difference, putting the spark closer to the center of the chamber a few MM and I noted better gas mileage… 5-10% on my delivery routes. We are talking Champion and Delco and Autolite, all-American plugs that lasted maybe 6000 miles before performance drop off, very common in the days of the 6k tune up interval for ANY stone ax era points-fired car. In ancient times we used steel tipped spark plugs (at least we always called them such). Cons – Not recommended for electronic DIS.Pros – Recommended for Waste Spark Systems Reliable.The benefit of the waste spark system is that it is more reliable and isn’t affected by environmental conditions such as rain or dampness. The spark for the latter gets wasted because there is no ignition there. This system causes the spark plugs to fire twice, once in the compression stroke’s cylinder and the other in the exhaust stroke’s cylinder. If your distributor ignition system is a waste spark system, then double platinum spark plugs are recommended. Read also: 5 Symptoms of a Bad Brake Pads and Need to Change Immediately Double Platinum Spark Plugs Cons – Not the strongest spark plug on the market.Pros – Lasts longer than copper Reduces debris buildup.If you have a new car with an electronic distributor ignition system, platinum spark plugs are recommended. These plugs also generate more heat, which means that debris buildup will be reduced. The copper spark plug only has nickel alloy material in this area.Īs a result, the platinum spark plug is more durable and can last as many as 100,000 miles. Pros – Harder than platinum Lasts the Longest Uses Less VoltageĪ platinum spark plug is similar to a copper spark plug, except that its center electrode has a platinum disc which is welded to its tip area.If you already have these spark plugs installed and you need new ones, do not downgrade to platinum or copper because they will diminish the performance of your vehicle. That is why many car manufacturers are starting to recommend iridium spark plugs for their vehicles. These spark plugs have a small center electrode which means they use less voltage to generate the electric current. Although you will have to pay more money for iridium spark plugs, you will get what you pay for. Iridium is a metal that is harder and more durable than platinum. Iridium spark plugs will last the longest. Cons – They don’t last as long Requires more voltage. ![]() Pros – Better for older vehicles built before 1980.It is best to use copper spark plugs in older vehicles which didn’t have high electrical needs. Nickel alloy is a material that is soft and not very durable. This means it’ll need more voltage to generate an electric current. Its central electrode is made from nickel alloy and it has the largest diameter of all the other spark plugs. This spark plug is mostly made from solid copper.
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