Video: Learn About Spark Plugs - Counterfeit, NGK, Iridium, etc

[martinq]

Just finished watching this and it's a really great add-on to the Torque Test Channel (We Tested $500 in Spark Plugs...). I can't imagine how many plugs I've changed (thousands?!?) but I still learned a few interesting things in this video. It's over 30 mins but there's a bunch of good info here and it's not sponsored. I'm going to watch it again soon and take a few notes.

- why NGK?
- why people bring their own parts to a shop for install (should they allow it?)
- "copper" plug advantage
- the potential problem with long lasting plugs (breaking / seizing)

Fake Spark Plugs Ruined a Customer's Engine: Learn About NGK, Performance, Iridium and Buying Safe
Fluid MotorUnion
Apr 4, 2026

 

[Chris142]

I am certain that the Autolite #985 plugs I bought off Amazon a couple years ago were counterfeit. The electrodes wore off in a few thousand miles.

 

[D60]

I like him. Good tech combined with experience based opinion