15W oil isn't all that bad, at least IMHO. When my dealership installed my progressive fork springs, I also had them put the 15W oil in; the handling is noticeably more comfortable, without being unduly harsh on bumpity bumpity surfaces, and is still reasonably plush. Now based on my mileage with the 15W, maybe the 20W would be a tad too harsh, but I think the 15W is just fine. And the roads here in LA / MS / AL aren't exacly baby butt smooth either. Regards to all :-)
