[rockyrivermark]

Follow hose off the radiator cap if it has a hose.
That's likely where your antifreeze is going. Puking on the road while you drive.
Normal for level for be a little low in radiator unless u have an overflow tank which is a good idea as noted here.
If no white smoke out exhaust and no excessive oil level (antifreeze getting in oil) then that's likely what's happening