HEadgasket failure, internal oil cooler leak.
Antifreeze in the oil of any engine means there is a crack in the head gasket, or worse, in the block.
A head gasket is leaking or the Head is cracked.
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.
the engine is burning oil. blue smoke oil white smoke antifreeze black smoke excess fuel
Look at the oil on the dipstick. If you have antifreeze leaking into the crankcase the oil will be milky.
A bad head gasket can do that or an engine oil cooler gone bad in the radiator. The year, make and model info would help.
Intake gaskets have failed.
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.
vehicle will overheat. just dump the oil and antifreeze , flush engine and refill with clean oil
antifreeze....
If you start and warm up your engine: 1) The oil gets very foamy and mucky, and does not circulate through the engine properly. 2) The water in the antifreeze can heat up until it turns to steam, which expands with great force, and breaks some part of the engine. It's best to have the oil changed. That will empty the engine of the oil and antifreeze mix.