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What is your EQ 04 FICO? Why not apply DCU? They are the kings of auto loans.
once you refi you should be able to ask for a refund on the gap coverage from the auto loan you just paid off... they may pro-rate but you can get it back.
don't forget that if you are still close to value of car if you refi, you have to buy gap coverage again from the new place you refi with.
I would NOT bother trying with Capital One.
I would do DCU as suggested.
I would also get out of a 72 month loan and down to 60 or less!