There isn't a BMW branded oil here in the UK. The recommended oil is Castrol Actevo 20W-50. In fact, I'd be surprised if that isn't what the BMW branded oil is. There's a close relationship between BMW and Castrol and Castrol test their oils extensively in BMW motorcycles. I know this because I have a buddy who is an executive with BP Castrol.
However, at 6K miles, I'd be inclined to use the dino Actevo, rather than the semi-synth X-Tra.
"A map is not the territory it represents, but if correct, it has a similar structure to the territory, which accounts for its usefulness".