Re: Engine temp? 230?
One of the few off the shelf oils that still has a good zinc content is Shell Rotella, I use that in my Intruder 1400 and have used it for all of its 60,000 miles of hard riding. The reason Rotella still has a nice ziuc content is because it's not regulated the same way motor oils for passenger cars is and it falls under a different catagory so the epa can't stick their nose in it like they can for passenger cars and light trucks.
Last time I opened up that engine was at about 50k miles to replace a clutch cover gasket and it looked like new inside, no sludge anywhere, and this oil doesn't turn black when changed on time.