Never got a CEL from mine, but at exactly 50k I decided that was long enough and changed it out last year. It was actually in pretty good shape, good enough that I cleaned it and decided to keep it as a spare.
I wasn't surprised as 90% of my driving was interstate, going up to the farm in Ga. and back. That has changed however, as my Grand Cherokee is laid up with a major engine issue, so I am planning on needing more frequent maintenance on the truck as it has once again become my daily driver...
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