INCOMING!!!!
The break in oil is semi-synthetic. Triumph recommends Mobile 1 4T synthetic for a reason.
Semi-syn oils are mineral base oils with a synthetic additive package.
Synthetic oils use a synthetic base. It is the additive packages that make one oil better than another.
Mobile 1 4T is a good oil, you can get an even better oil that will protect better, last longer, make more power, and cost less than what your dealership charges. Do some research into oils. This site and the internet are FULL of good information. Try to sift through the hype and the personal beliefs (lots of these), to make a good choice.
Decide what you want to spend, how often you will change your oil and filter, where you will get your oil (local, or order it), and then make a decision on what you want to run.
I hope this helps.