No the engine is not ruined. It needs a new head gasket and an oil change after the gasket been changed.
If you continue to run the engine with coolant mixing with engine oil it will ruin the engine.
That would depend on automaker, and when the car was made. contact the maker.
Depends on your powertrain warranty. If it's still covered, you should be golden.
A bad head gasket is the most common cause of antifreeze mixing in the oil. The antifreeze will dilute the oil and it will eventually cause your engine to seize up.
Look at the oil on the dipstick. If you have antifreeze leaking into the crankcase the oil will be milky.
The engine will overheat and can cause severe engine damage. The engine will be completely ruined if it is not immediately shut off.
Intake gaskets have failed.
You can but then the mixture will turn into gel and your entire coolant system will be ruined. If you continue driving your engine will overheat and your car, destroyed.
Antifreeze in the oil of any engine means there is a crack in the head gasket, or worse, in the block.
That means that there is engine coolant / antifreeze leaking into the engine and mixing with the engine oil. You must have an 1997---2000 modal V-8 or V-6 engine. It is very common for the intake gasket to leak coolant into the engine oil on those engines. Are you sure it did not freeze and crack the engine block ?? If you know that it had enough antifreeze in it not to freeze, Then you may get lucky and flush the engine oil and replace the oil filter several times AFTER you replace the intake gasket. OIL and ANTIFREEZE don't mix well and the antifreeze will destroy the engine BEARINGS.
NO!!!! do not do this, oil is oil, transmission fluid is transmission fluid, and antifreeze is antifreeze, do not mix any of these, it can perminately damage your engine.
the oil lubricates the engine parts, without it the engine would lock up and be ruined
vehicle will overheat. just dump the oil and antifreeze , flush engine and refill with clean oil