Congratulations on the great performance and good luck in the future! My problems did not start until I hit about 30K miles. Until then, only non-operational issues (poorly fitting seat cover, loose fog lamp, trim issues, etc.) then the routinely getting 25-30 mpg on my Laramie 4x4 driving in mountainous and semi-mountainous terrain. Then the dreaded CEL issues started. It was like playing CEL roulette In fact, I'm at the dealership as I type this message waiting for the rental car while they replace the SCR catalyst. I'm scheduled to leave for a 2800 mile round trip next week and have more than a little concern the system will fail on the trip leaving me stranded in the middle of nowhere. Hopefully this will fix the problem.