Can anyone here shed light on the recommended 25,000 mile service
intreval recommended for spark plugs in my Magnum RT with the 5.7L
Hemi? I replaced them once at about 30,000 and that did not help with
a rough idle that the car has had nearly since it was new. Now I'm
due to replace plugs again. The original plugs looked like new after
30,000 miles. I suspect the current plugs are the same. Any point to
replace them? They cost $5 each and the Hemi takes 16 of them, so I'm
hesitant to spend the bucks if I don't need to.
Dan
