First time cummins owner, got it 2 weeks ago. I plan on doing 1st oil change around 2000 miles. Did a lot of web search and cant find if motor comes from factory with synthetic oil. Owners manual says towing good loads during first 10,000 miles helps with wear in. I use truck empty every day for my short daily commute, but plan to occasionally tow my trailer around to help with wear in. Would using synthetic during first 10,000 miles have any impact on the wear in? Also which filter fleetguard stratopore or Donaldson blu? Which is better for warranty?