You can run a CI-4 oil if you can find it. You can also run CI-4 oil in your 07.5 trucks but will cause the dpf to fill up 33% faster. Pick the oil that you want rather it be synthetic or conventional. Most people are going to go with Rotella.
A forum community dedicated to Dodge Cummins Diesel truck owners and enthusiasts. Come join the discussion about reviews, drivetrain swaps, turbos, modifications, classifieds, builds, troubleshooting, maintenance, and more!