Got milky oil what the best way to flush it out.

Change it 2-3 times running it 10-15 minutes in between then just run it as you would normally keeping an eye on it.the heat will evaporate the little water left in no time

You can use cheap oil for the flushes, do the filter too. You did find the problem right? Also let it drain overnigt before you put the good oil in.

yes I found the problem