Always had mine maintained at the dealer who used whatever oil they were supposed to. I noticed that when the oil was "fresh" it was very difficult to get into neutral but as the oil aged it got easier. Think it has to do with the stiction of oil on the wet clutch plates. I didn't worry about it just rode it and it was fine. Always amazed at the really clean used bikes in the UK. A great buy in my opinion. I came from a Kawasaki ZX6R 636 ABS to the F800GT and it seemed very plush in comparison but the turn in was very similar and the brakes good as well. Didn't have the top end rush of power or the scream. The ZX6R alerted every policeman within hearing range that someone was playing and likely exceeding the speed limit, F800GT was much more "respectable" 
