Spoke to Kohler tech today at my annual update, and discussed the overfill situation of the fuel tank, and see if he had heard anything. He said that he hadn't heard of any issue, but said that the overfilling, leading to raw fuel being drawn into the into, should result in poor running or flooding to the point of not being able to run. Suspected that the oil use issue may be due to other causes than the fuel being sucked into the intake.