Just got new FLSTSE2. While chatting with service mgr at local HD dealer, he has been helpful and very knowledgable so far in two years I known him. He got very adament when I told him I was going to use HD Formla + in the primary, he claims the proper oil is the HD synthetic; the Formula + is not as good in heat and the possibility of burning out clutch is way more likely. This is a guy that usually seems pretty laid back about HD vs aftermarket and it was a surprise to see him get so hot about which product to use. Both HD so? What is your guys thoughts??