So You Just Have To Have Iridium Spark Plugs eh?

[curtmaxwall]

Originally Posted by bronsin

Here are sparkplugs out of identical four cylinder engines. The ones on the left are iridiums with 30k on them the ones on the right conventional plugs with 70k.

Note the slender electrode of one of the irids is totally worn away. The other three were normal.

Both owners reported normal operation and gas mileage.

Are Iridium plugs another thing to waste your money on like synthetic oil?

You decide.

Iridium is one of the hardest, strongest and rarely available materials on the earth’s crust. Iridium is the best, but too hard to handle. Iridium is 6 times harder, 8 times stronger and can withstand temperatures exceeding 2454° C. It improves firing performance, smoother idling, improved engine performance and when accidental fire and misfiring rarely occurs under various driving conditions so we can say it decrease fuel consumption. So I can say its better, if you like.

[bronsin]

Originally Posted by curtmaxwall

Iridium is one of the hardest, strongest and rarely available materials on the earth’s crust. Iridium is the best, but too hard to handle. Iridium is 6 times harder, 8 times stronger and can withstand temperatures exceeding 2454° C. It improves firing performance, smoother idling, improved engine performance and when accidental fire and misfiring rarely occurs under various driving conditions so we can say it decrease fuel consumption. So I can say its better, if you like.

Did you see the picture? The center electrode is trashed after only 30k miles.

How that happen?

Note the conventional plugs on the right. They are worn but the owner reported normal engine operation after 70k miles.