You need to change the oil filter too.
Harley 20w50 fully synthetic
I change my oil at 2500-3000 miles as the temp is so high. I mainly do it by oil colour as when it goes very black it seems sensible to change as the tappet feeder pipes become gungy.
I got my oil tank upgraded to one with the tap. It may be worthwhile for you too as the pipe's oil seal is never as good again on the early ones. I used to get constant slow drip leaks so I suggest using white spirit to properly clean the metal pipe contacts and end of the pipe to get a good seal.
Pm me if you are going for a drive this afternoon!
Last edited by charlestkirby; 05/04/15 08:16 AM.