When I did the tune up on the van I put anti-seize on the plugs. Then read you shouldn't. Probably due for another tune up in 20,000 miles but I'll have to let the mechanic do it. Hopefully they won't be messed up.
Shouldn't be an issue. The biggest issue the manufacturers have with its use is over tightening. They say you reduce friction and can over torque them.
When did it change and what is the coating on the plugs? There are different types of anti seize so does one need a specific type?
I fall on using a bit, but my vehicles are older.
It's called Trivalent Coating. I think it all came around when iridium plugs became popular.
Here's from NGK website
"1. Anti-seize
NGK spark plugs feature trivalent plating. This silver or chrome-colored finish on the threads is designed to provide corrosion resistance against moisture and chemicals. The coating also acts as a release agent during spark plug removal. NGK spark plugs are installed at the factory dry, without lubrication or anti-seize.
Anti-seize can act as a lubricant, altering torque values up to 20 percent, increasing the risk of spark plug thread breakage and/or metal shell stretch. Thread breakage can sometimes involve removing the cylinder head for repair. Metal shell stretch changes the heat rating of the spark plug and can result in serious engine damage caused by pre-ignition. Do not use anti-seize or lubricant on NGK spark plugs. It is completely unnecessary and can be detrimental."
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