Milky brown engine oil is an indication that there is coolant in the engine oil. This indicates a very serious problem that is costly to fix. This is usually caused by a blown head gasket, a failed transmission cooler or cracked castings. Another indication of this kind of trouble is exhaust that is very visible and steamy white in appearance. If you have any of these symptoms, you should stop driving the car and have it towed to the Ebers Street Garage for repairs.