UOA results @ 325k
Comments — “Wear metals read nice and low, showing no evidence that the hard starting caused excess wear during this most recent oil use interval in your F250’s diesel engine. Potassium and sodium have also been reading a bit higher than we like to see, but these amounts aren’t enough to cause concern and we will continue to watch for signs of coolant in the future. The TBN was 7.1, plenty of active additive remaining in the oil for a longer run. Try running the next oil out to about 6,000 miles and then check back to continue monitoring the health of your engine.”
