UOA results @ 293k
Comments — “We had hoped that iron would continue to improve in the latest sample from your F-250 but it increased ever so slightly here. The 2 ppm increase isn’t anything to get too upset about but it does appear that a steel part is still wearing poorly. All other wear read right around our universal average levels and in the proper balance. No fuel, coolant, or moisture was found. The TBN was still strong at 7.1 so you still had plenty of active additive left when this fill was changed. If you’re comfortable with wear at these levels, try 6,000 miles next time.”
