When, if ever have you heard of an oil related failure on a Gold Wing, regardless of what oil you use. I know guys that run over 200,000 and 300,000 miles with regular oil and don't even change it as often as it should be changed and never had a problem. Bottom line, run what you can afford and feel good about, I ran over 100,000 miles on my 92 Wing and used Castrol 10W40 and never had a problem and never used a drop of oil, I ran over 60,000 miles on my 98 with the same stuff and same results, my 02 only had 37,000 miles on it when I sold it and I ran Shell Rotella synthetic and my 08 I ran Honda GN4 it had 29,000 miles on it when I sold it, the main thing I changed all of the bikes at 3,000 miles or 6 months, which ever came first.