I recently changed the oil in my 620i gator. I added 1.4 quarts and then later added another 1.4 quarts, forgetting I had already added oil previously. I drove the gator around the yard and it smoked terribly. Trying to figure out what I did I drove back to my shop which was approximately one hundred yards and discovered I had added twice too much oil. I immediately drained out the oil and added 1.4 quarts of new oil. My gator still, after two and a half hours of runtime still smokes. It has never smoked in the past until I added too much oil. Any suggestions about what I could do to possibly cure this problem?