Remember, don’t try to adjust the gap, that little whisker is fragile.

 

That part number is for the SS. Not at all sure it's right for other motors.

 

Thanks for the tip Blue ! The coil packs seem to be fine so I see no need to change them now ! Could I use a tiny bit of anti seize on these ? I know some plugs are already cooated and it is a no go on anti seize !

Thanks

 

I'll double check that #.. Thanks for the tip
Just looked at Auto Zone and show the same plug for the 2.2

 

?? Think you may have that wrong. He did say 41-103 which is for the 2.2 and 2.4.

 

Y’all know I got it memorized.

 

And I don't... Memory fades...

Sorry for any confusion!

 

TLDR - ruthenium for spark plugs even if not better should be almost as good as iridium and should cost less if not yet, eventually.

I am not an expert on this but got curious and was just doing a little research on ruthenium. Iridium is very rare and costs more than twice as much as gold. Ruthenium is more plentiful and costs less than 1/10 of what Iridium costs, and the melting point is almost as high as iridium, and it’s not as brittle.

Both elements are very inert but iridium does like to combine with sulfur, which is in gasoline sometimes.

Melting points, Celsius:
iridium 2446
ruthenium 2334
platinum 1768

Ruthenium plugs might be better but even if not could very likely prove to be the best “bang” for the buck.

Or, someone could come up with an even better or more cost-effective alloy.

Iridium is even denser than tungsten and would make great darts but would require $2600-3500 worth of raw material so would need sell for, oh, $5000-10,000? Or more. Each.

For a few facts and mostly soft soap (“Time improved by over 0.7 seconds”) -

https://ngksparkplugs.com/wp-content...park-Plugs.pdf

 

It’s all academic, I’ll stick with the iridium, the engineers that designed the Ecotec selected it and designed the engine for them. I must say, mine runs much better with the AC Delco plugs. I tried a couple of other brands , very disappointed with them , Bosch with the four ground electrodes, Motorcraft copper core, Champion Copper, and E3 performance plugs, all did not live up to the AC Delco iridium plugs, oops , I slipped in my soapbox.

 

I'll stick with the AC Delcos.

But this has a bit of info:

Iridium vs Ruthenium spark plugs | Bob Is The Oil Guy