# Platinum v.s. Iridium

**URL:** <https://community.cartalk.com/t/platinum-v-s-iridium/46>\
**Category:** Maintenance/Repairs\
**Tags:** sparkplugs, plug, ignition\
**Created:** [May 27, 2007, 11:30pm UTC](https://community.cartalk.com/t/platinum-v-s-iridium/46 "2007-05-27T23:30:36Z")\
**Posts on this page:** 1\
**Showing post:** 31

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**Author:** ![TwinTurbo](https://avatars.discourse-cdn.com/v4/letter/t/8baadc/32.png) [@TwinTurbo](https://community.cartalk.com/u/TwinTurbo)\
**Post date:** [January 29, 2018, 3:06pm UTC](https://community.cartalk.com/t/platinum-v-s-iridium/46/31 "2018-01-29T15:06:45Z")

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> [@B.L.E](#):
>
> Why not tungsten?, it’s harder, has a higher melting point, and is way cheaper than iridium, which is one of the rarest metals on earth.

It’s not pure Iridium, it’s a sintered alloy. I pointed out some of the benefits previously here- [Iridium sparkplugs? - #17 by circuitsmith](https://community.cartalk.com/t/iridium-sparkplugs/63809/17)

Here’s a good summary if interested- [DENSO SPARK PLUG](http://www.globaldenso.com/en/products/aftermarket/plug/topics/2005/pdf/SAE-Manuscript.pdf)

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