Ok guys im sure there's plenty of threads on this but I wanna do a new one so I don't have to spend a lot of time searching lol... So, how does Bel-Ray Primary stand up against Formula + and Amsoil Primary.? The Harley Service guy said to only use Formula + and nothing else but I can't find this fluid nowhere online to order it! I did find only two on ebay and the seller is in the UK! So, I heard good things about Amsoil primary and was going to go with that but they don't ship to PO Boxes lol and lastly I ended up finding Bel-Ray and they actually ship to POs... Is it good? Will it stand up against Formula +? And why does Harley-Davidson insist on Formula +...?