I have an 05' 5.9 CTD and should hit 100,000 miles next week. I've done all my own maintenance and oil changes and have had probably a dozen UOA's done from Blackstone. I've used many different oils. Only Fleetguard Stratapore filters. Chevron Delo, Valv Prem blue, JohnDeere +50, Rotella 15w40...