Rob,
Yes, NJ & Oregon do NOT allow you to pump your own fuel. However, I've found that once the local pump jockeys knew me, they pretty much let me pump if I want to. This was also true of the attendants in Portland, OR (I spent over 6 mos doing the bi-coastal commute while doing some test marketing). So while on paper they won't, in reality it's negotiable. I usually add the additives before going to the pump since it's only 2 miles from home.
I love watching the other drivers pull up to the pump & then having to find another pump when they realize they pulled up to a diesel pump. Also nice to see the big rig drivers come over & say "Wow, I didn't know these came in diesel."