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I am buying new sparkplugs for my 2006 Volkswagen Passat 2.0T and i purchased pulstar be1h10 sparkplugs with a plasma core, but i am now being told that they are not good for my car because they arent iridium but they are made of an inconel super alloy. I did a bit of research and a majority of what i found is that inconel is actually a very strong and durable precious metal. I am wanting to know if i should use the pulstar spark plugs or if i should return them and buy iridium spark plugs. My other research also shows that pulstar spark plugs are actually really high quality. So what im wanting to know is if i should use the pulstar spark plugs or buy iridium sparkplugs. Would anything happen to my car if i do not use iridium sparkplugs?

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    Good job identifying some properties (strong, durable) that may be relevant. It doesn't matter what material the sparkplugs are made from. You could use a sparkplug made out of chocolate if it performs well in your specific engine. A material may be generally better, but that generality doesn't matter for your specific engine. There is probably a sparkplug that performs "best" in your specific engine. – Zach Mierzejewski Nov 4 '16 at 20:35
  • I put "best" in quotes because mechanics and parts guys will tell you which one is "best", but "best" in this context means: good enough to not cause problems. There may be more than one brand that meets that criteria. Just stay away from the brand people have had problems with. – Zach Mierzejewski Nov 4 '16 at 20:35
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There are two significant design differences between these plugs.

One: The Pulstar plug has a much wider center electrode than a typical iridium plug. A thinner electrode allows better spark plasma to fuel mixture exposure. This results in faster ignition and less misfire.

Second is metalurgy; Iridium melts at over 4000 deg F while Inconel melts at around 2500 deg F. The higher melting point of Iridium allows the finer wire electrode which in turn results in the benefits to ignition noted above.

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