Once the leak is repaired, simply perform a normal oil change to get the antifreeze out of the oil. If a real lot of antifreeze circulated in the oil passages, a second oil change might be in order after a few miles.
Water in the oil is bad but won't kill the engine right away. Antifreeze will melt the outer layer of the soft engine bearings if given enough time. Since you caught it right away, there's little chance anything will be permanently damaged.
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Friday, November 11th, 2011 AT 7:34 PM