I'm wondering if anti-seize affects grounding of the plug, that's the only reason I can think of why it would be recommended against using it.

 

What is anti-seize compound made of?
What is Anti-Seize? Straight out of the tube or bottle, anti-seize is made up of a high-quality grease base and lubricating solids (copper, graphite, aluminum, calcium oxide etc.), which are suspended in the grease.

So, you have copper, aluminum, and graphite in it, all of which are electrically conductive. No ill effect on plug grounding......

 

They recommend against it because it affects the torque spec.....

Unless stated to use anti-seize, spark plug torque specs are "dry torque" specs. The addition of anti-seize will then yield a higher torque value than the torque wrench is set at...

 

I thought we learned anti-seize torgue to 12 ft/lbs and all is well. Are the M8's using a different thread?

 

yup. They are only 10mm plugs in the M8.