Join Date: Aug 2012
Location: Whangarei, , New Zealand
As long as it's not blowing blue smoke (or if it's only occasionally) - I wouldn't worry about it. Mine goes through stages of using oil. Some rides, it doesn't - others, it'll need a top up before the next outing. Just check your oil before you go for a ride, and if you can, carry a litre (quart there I guess) bottle as an emergency backup. I always have my tankbag on, so no problem there.
BTW - my bike's at 78,000kms, with the rings only having been changed at around 25,000kms due to my breaking an oil ring during reassembly from a broken studs repair.
I wouldn't change to 20W50. I'd use it if it was the only choice, and I was just topping up the engine to get home - but not for general use. Tight tolerances like thin oil when they're cold, and that's the only effect using the 20W50 would have - it'd be thicker than the 10W50 when cold, but not necessarily when hot.
'95 900 Superlight IV #064
Mods are: K&N filter, airbox lid on with rubber trumpets removed, MBP collets, full SMI (SilMoto Italia) spaghetti exhaust with 'open' carbon cans, 41mm FCR's - #182 mains!, Barnett alloy clutch basket, Oberon slave cylinder, Ohlins fork springs, Ohlins rear shock, Verlicchi swingarm.