I put new motor in my 89 jeep wrangler. i added antifreeze heard it drippn n oil pan. checkd oil and antifreeze was in it. didnt start it.
The new engine is factory new? Or is it rebuilt/used? You usually get coolant in the oil through a blown head gasket/ warped head.
It seems as though you have a leaking head gasket allowing antifreeze to pass by.
The best option will be to get rid of the oil and replace it with fresh clean oil. Oil mixed with antifreeze will not be able to perform its functions to the fullest. You can consult a mechanic for more details.
Sounds like a cracked water jacket!!!