i never do, nor does anyone i know.plugs arent directly connected to the battery, so no harm can be done to the electrical system. manuals tell you to disco the battery while doing any engine work simply as a safety precaution.one more stupid question - do I need to disconnect the negative lead on the battery?
X2. Well said and exactly right. The factory only installs conventional plugs because they save a few dollars each plug. Conventional spark plugs onlyThe platinums will last longer (a lot longer) and the copper plugs will wear twice as fast in the distributorless engines (2000 and newer) In other words the 30k copper interval will be reduced to 15k in a DIS system. Copper plugs aren't recommended for the newer DIS motors any longer. I learned this in the Autolite Challenge course I recently took which was linked to this site.
I read about this gig. It looked like a fancy sales promotion to me, nothing more. If Honeywell ever starts designing and mfg. a decent product, I'll buy. In the meantime, products like Fram and Autolite (as you mentioned, among others) are still junk.I took that challenge course too. It convinced me that maybe I was wrong all these years...Fram/Autolite hasn't changed, still trash.