I just bought a nice 2003 honda shadow ace VT750CDB from my step dad and it has 10,859 miles on it. I was wondering what would you guys suggest on which oil would be best for the bike. The owners manual says to use Honda GN4 10w-40 without moly. I went to the honda shop and got a Honda filter and 3 quarts of the GN4 10w-40 oil. This is what they suggested. I was going to get the Honda HP4 Synthetic blend without moly and they suggested just the GN4 because something about the clutch. I been doing alot of reading on the used oil testing section but its all chinese to me I dont know anything about it. I already done the oil change but I would like to here some input from all of you for the next time because the GN4 was kinda steep on price. Thanks!