The farthest I've gone between oil changes on the NT has been a bit over 11,000 miles back in '13. I rode from Denver to Fort Morgan (my home then) to Spearfish, to and around Alaska, down the west coast to San Ysidro, and then from San Diego to Baton Rouge, where Tim Wilke graciously did an oil and filter change for me. Seems like he uses Amsoil. I had had Honda Full Synthetic in the bike when I left on the Epic Post-Retirement Ride.
The farthest I've ever gone with Rotella was over 12,000 miles on a long trip with my 1st '99 Kawasaki Concours. I typically did oil changes at 10,000 miles once I got past about 50,000 miles on the bike. At 115,000 miles the engine was still going strong at 115,000 miles until I wadded the bike up one night in the mountains.