Well it has been 80K miles and 7 years since I last replace my spark plugs.

Thanks to anti-seize compound on the plug threads and dielectric grease on the boots (the last time I replaced the plugs) the plugs came out with a little force. It was much better then the original plugs which I replaced at 80K miles/4+ years which I had to struggle getting not only the boots off but also fought with the plugs the entire way out.

Needless to say I put anti-seize and dielectric grease on the new plugs.

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Ray
1998 Mercedes E320, 200K Miles
2001 Acura 3.2TL, 178K Miles
1992 Chevy Astro, 205K Miles

Just don't use your torque wrench to tighten to published specifications because you'll overtighten.

http://www.boschautoparts.com/NR/rdonlyres/E2F7DCC0-7876-4184-9F58-5F4FD984DA81/0/TighteningTorque.pdf

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Kent Christensen
Albuquerque
'07 GL320CDI, '10 CL550. '01 Porsche Boxster
Two BMW motorcycles