Hi all I am changing oil on an 08 FLSTC that I purchased last year. I have been with help fixing it up and getting it street ready. My question is I had to put a new oil tank on, what kind of oil should I put in now?? Harley says to put in their 50w20 regular. other people have stated put in a synthetic brand others have stated put in amsoil synthetic?? Also my fuel gauge that I got is broken the place I received it from is going to get me a new one. Is it worth it to put on or should I just chrome it out?? thanks all..