you would save a total of $1,220 over 6 years. It all depends on if you want to fork over 2500 now for $1220 over 6 years (total of 3720 over 6 years)
I recently bought a vehicle for $37,500 at 5.29% over 6 years. My out of state credit union offered to refi it at 3.99% over 6 years. The catch with them is because I don't live in their state, they can only approve me for $35,000. Is it worth paying $2,500 out of pocket to knock it down to $35,000? The monthly payment would be $547 compared to $609, saving $62/month.
If you can afford paying the upfront money I think it is well worth not paying the extra interest.