So I parked my car for the winter and I have about 1/4 tank of gas. I haven't started it in a few months. Should I let it run for a while? Fill it up with premium gas? Any suggestions?

Thanks

 

Get some additive to remove the water in the tank from it being left at 1/4. Fill it with decent gas and drive it. If it's only been since fall, you should be OK.
Next year, fill the tank, add Sta-bil to the tank, run it a few minutes to circulate the additive and park it.
I have a couple project cars that may sit for a year or more, the Sta-bil works great, keeps the gas from turning into varnish. Full tank keeps the condensation down.