I love Goldfinches......my fav's are....Hummers, Goldfinches, and Cardinals in that order.
I'm not sure about your oriole feeder but:
When should I put my Hummingbird feeders out? Last year they were more interested in the lilacs than the feeders.
You can check the link below to see if they are in your area yet.....
//www.agardenersforum.com/forum/ubbthreads.php/ubb/showflat/Number/190118/nt/4/fpart/1