The book says 3,000, not 3,600 miles, but I doubt going to 3,600 would cause any probems. I did it at 725, 3,450 and plan on going to around 7,000, then switching to full synthetic Amsoil and changing every 5-6,000 miles after that when ever I can get to my dealer. To me, every 3,000 miles is a little much....I have changed my Wing oil every 8-9,000 miles for years with no ill effects.
:spyder2: