First Generation MDX (2001-2006)
Replace the original plugs at 96k with ngk about 6 years ago.
Now at 177k, I was getting an occasional misfire as I would crowd the gas at about 65-70 and occasional p0420 code. Pulled the plugs to check them, also checked valve lash. Gap on old plugs was huge.. .085 or larger. Put in new ngk...