OK guys, we just bought my daughter a 2007 dyna low rider with 2845 original miles and want to change the oil in it. the oil in it now is real clean but want to change it anyways. my question is , do i now use syn. oil or reg oil 20 x 50 weight because of the low miles? how many miles should be on a harley engine before it is considered broken in? i have never had this situation before as all my harleys have been well broken in when i bought them. I am a big Amsoil oil guy but i don't even know if they make regular oil for bikes so i could use your expert advice. we are also looking for a sissy bar for her bike and if any of you have one get in touch with us.