A bad head gasket , warped head , cracked block etc.
The antifreeze/water mixture is too weak for the conditions or you have engine oil or trans fluid mixing with it
You possibly have an internal water leak in the engine, ergo, a cracked block.
antifreeze....
there is no water mixed with the oil but have antifreeze coming out of the exhaust
No ! antifreeze is usually mixed 50/50 with preferably distilled water for your cooling system
I'm not a mechanic / technician but I believe if antifreeze is getting into the engine oil it is because of a bad head gasket , or perhaps the head has warped
Could be water or antifreeze getting into the oil
If you find traces of oil in the antifreeze it's an indication of broken engine gasket. You need to go consult with a professional.
No, oil is lighter than antifreeze.
no but antifreeze in oil will eat the bearings
You mean like water in motor oil? Easy to find out: just look at it. If it looks like mayonnaise, there's water in it.
You may have blown a head gasket, check you oil to see if the antifreeze is leaking into there.