Minshall...I just posted with the same issue (among others) but you are correct. 3.4 quarts even with a filter change is way too much. I had to drain quite a bit of oil after that change and my machine still won't start. The operator's manual has many errors and this is one of them.Is everyone using the Deere Plus 50 oil? Also, the book calls for 3.4 quarts with a filter change. Has anyone found that this is too much oil?