Anti-seize on spark plugs?

[alanwagen]

Originally Posted by esse10

Using anti-sieze does not change the torque value. It might make the threads go a little farther in because of the lubrication. 10 foot pounds is still 10 foot pounds.
example; if you torque a nut to 10 foot pounds and it stops at 12 oclock on the scale, if you lube the threads and torque the exact same nut then it will stop at around 2 oclock on the scale, but it's still 10 foot pounds.

It's minimal difference I've used a little anti-sieze since day one with no issues.

NGK disagrees with you: Anti-seize compound can act as a lubricant altering torque values up to 20 percent, increasing the risk of spark plug thread breakage. You and I are not qualified to contest their claim.

[robkay]

Originally Posted by alanwagen

NGK disagrees with you: Anti-seize compound can act as a lubricant altering torque values up to 20 percent, increasing the risk of spark plug thread breakage. You and I are not qualified to contest their claim.

Exactly. The torque value is based on the friction between the mating threads. Apply a lubricant and you change that. I would not do it on spark plugs.