I used the power racing RS in my BMW GS once, and never again. It consumed it to where I had to add oil 2x a month, and it was thick when cold so it cranked slow and was noticeably stiff the first mile.
Back to Mobile 1 15W50. Side effect, fuel mileage improved.
That's a bummer the bike consumed oil. Trying to understand if it was noticeably thick and caused hard cranking and was stiff when you start to ride, those are indications the oil has more viscosity and would be less prone to consumption.
The analysis above shows a flashpoint of 435 for virgin oil. Is that on the low side? I don't know so I'm sincerely asking the question.