I have a 2006 f-250 and it overheated in a time frame of 5-10 min. The air conditioner was off. The engine oil was mixed the water coolant I have, but the water did not go into the engine. What could have happened??

Head gasket leak between the cylinder, water jacket and oil gallery. Oil pressure is higher than water pressure that's why oil is in water.

Why would it overheat if all the water levels where correct. And I drove it for 15 min. The truck is not used on a Daily basis but I just came back from a trip last week, and did not have any issues.