Orginal fill changed at 1000, next at 5000. Total on truck, 10K. This run with the Delo 15-40, MC filter, 5K miles on sample 4 months. . About 3K moderate towing, 7K pounds. Most of the mileage with B90 biodiesel.
Iron 14
Chrome 1
Lead 3
Copper 15
Tin 0
Aluminum 6
Nickel 0
Silver 0
Silicon 41...