Thanks for the correction Fast Eddie! I am seeing now that you are right. I will have to scrutinize Jim's test results more closely. No problem returning the oil I bought, then I'll just have try again! Personally, I find it all a bit confusing. All I want is for my stock Norton to run dependably.
Thomasa, The engine has a pretty new "rebuild" from the PO, with a new stock cam from Andover Norton. Btw, my goal is to make it to the NWNO ride and camp out in Winthrop this June. There and back again, that is (from Seattle)!
On the primary oil, I'm with L.A.B., the hydraulic tensioner likes 20-50. Maybe as long as you choose an oil that's good for wet clutches, it will be fine? This Mobil-1 says it is. And my take on the clutches is they work best dry, but inevitably get oily. Keep the gear oil out, and they will be fine with periodic cleaning.
I have the push rod seal nut and new clutches. I don't expect that I'll be riding a lot of miles with my new old Norton just yet. Maybe more as I get used to it? At this point, I'm OK with tearing down the primary, once a year or so and cleaning everything including the clutches. Or, as needed.
Right now I'm just trying to get her together for my first Spring ride!
