Looking in the service manual it says change the oil every 9,300 miles or annually. Now I notice pegasus1300, you are living in Utah, like me. I think this is what some of my other motorcycle and car manufacturers call a "hostile environment" in their handbooks.
We live at 5,000 feet or thereabouts, so all our normally aspirated vehicles have to work a fair bit harder to produce the same level of power we would get at sea level, about 15% harder, for the same level of performance I think. Also, in winter we get quite cold with higher humidity levels and in the summer it gets pretty hot and dry with our cooling systems working especially hard in our frequent freeway traffic jams. Additionally, for many parts of Utah there is a lot of fine dust kicked up by the winds or being deposited from the rainfall, some of which does innevability get by the air filter and into the engine internals. If you are towing a trailer of course, this would also add even further to the stress on the engine and transmission. I ride two up most of the time and therefore I am pulling a higher than normal load, especially with luggage (well, mainly my wife's luggage).
Given that the winter tends to condense moisture into the oil, the summers really heat soak our engines, coupled with environment impacts like dust and altitude have, I would tend to reduce oil change intervals rather than trying to extend them.
Although BRP doesn't list separate service intervals for hostile environments in their handbook, over the past years having BMW and Triumph motorcycles along with Jaguar Land Rover cars and SUV's - they have all recommended oil changes for such environments as ours at about half the distance of that of the normal 10,000 miles. They seem to stick to the same service intervals or annual oil change requirements, but they suggest changing the oil and filter about twice as often from mileage requirements. I generally change the air filters too about twice as often, because of the fine particulate dust.
These are just my opinions of course, but so far I've not had any premature engine wear or oil related issues on any of the motorcycles or cars I have owned in the past 33 years of living in Utah, despite racking up quite high mileages on some of them.
I would love to reduce the financial cost and environmental impact of more frequent oil changes, but when other name brand vehicle manufacturers recommend more frequent changes for our hostile environment, I'm going to do the same for my Spyder under an abundance of caution.
YMMV of course.