A friend of mine has a Honda Odyssey with "100,000 mile" spark plugs. As anyone can guess, the van has 120,000 miles on it and the plugs have never been touched. How might one remove them without risk of damage. I thought of spritzing a little PB Baster penetrating lube into the wells and letting it sit for a while. Think that would work?
I take my plugs out every 30,000 miles or so just so they don't seize, but my friend never did that, and I fear that if he tries to get them loose something might break off and end up in the cylinder.