for those that have changed the plug, can you let us know if you used anti-sieze or not? I thought the purpose of the anti-sieze is to avoid the galling (sp) reaction between the steel of the spark plug and the aluminum in the head which can cause the thread of the head to be stripped the next time you remove it. (Kinda like the wheel spacers). Response appreciated and thanks in advance. I have a few more thousand miles to go before changing the plugs.