Just curious. If I was to rebuild an old... say triple... what would be the oil of choice for it? I've heard castrol but I wanna hear what others people have had success with. Synthetic?? Valvoline?And what grade? 5-W30?10W-30??DOn't be shy.. Speak up!!!Seems like synthetic would be the way to go especially if I planned on putting a lot of miles on it...Thanks in advance......