You will probably want to flush the engine out. It may take a couple oil changes to do it. You may want to thin the oil with some kerosene, run it at idle for a bit and then drain it. If you do this 2 -3 times it should clean up. Then fill it up with fresh oil and keep an eye on it. I do caution thinning the oil down make sure you don't drive it, just a fast idle.
