Paul and Tom,
Not scientific, but here are some basics, up to doing your mods.
Engine: appears virgin with no wrench marks on anything, leak free, has doohickey with torsion spring, I added KLX jet kit, cleaned and checked the carb, de snorkel, previous L mod done, uni filter, valves well within range, has thermobob, 16T front with stock 43 rear sprocket, full service, coolant flush and anything else I could think of when I bought it. Runs great and starts and idles with no choke at any temperature so far. Other than oil burn it runs perfectly. Seems fine on power. My riding friend bought a low mile 2015 with similar mods and equipment. We are neck and neck in a drag race. When I ride his, his isn’t as smooth as mine. I’m 6’3”, 240 with caribou/pelican 3 case setup always on the bike. Huge Cee Bailey windshield that I cut down a lot in height and width to fit me.
First 3k with no mods. Ran it about 400 miles with what was in it, which he gave me an extra qt of Lucas synth 20w-50. Mostly 2 lane 60 and under and back roads, gravel roads and very light off road. I added no oil but went from top of glass to about half way down cold when I changed oil and filter.
Next 500 miles was with valvoline MC 20w-50. More highway (non interstate) 65 and under mostly. And some backroading. Used about 1/4 qt. Shifting felt a little clunky with this oil for some reason so I drained it.
Last 2k to now was with mobil 1 15w-50. First half was 2 lane with several trips to national forest and some longer back roading and gravel trips around here. Probably 75% highway to 25% backroad by mileage. The last 600 or so of this has been highway to my moms house and back, 300 mile round trip. 65-75 mph. The last trip was on a 90 degree windy day and I rode it pretty hard. 70-75 both directions, it used almost a half a qt in 300 miles. I started with a 5 qt jug. At 2000 miles I have a half quart left with the sight glass full.
With mods in place I changed the oil and filter last night to rotella 10w-40. When it stops raining I’ll get back to riding it and see how it does.