Interesting Peter and I have had our 'check oil level' warning has come on just below half glass. Mine did on a trip I'm currently on. I was checking each morning and it was right at the bottom of the red dot the day it came on after I had the bike on the center stand overnight. Mine also showed up on my Nav V with an indication to check oil level. It did not do it again if I put the bike on the center stand and did not start again for 15 minutes but did come on if left on the side stand. I stopped by a BMW dealer and their Master Mechanic put the bike on the BMW computer to check and it indicated low oil. He shared with me the sensor in the bikes is sensitive to oil levels if below the center dot especially if on the side stand and the bike is up righted and started immediately. He put in enough oil to being the level just below the top circle. I've had no indicator come on since then which was 1200 miles ago and have noticed no difference in the shifting with or without the clutch. I'll ask my regular mechanic when I get home his thoughts. I need to go in for an oil change and new tires when I get back home in another 1500 miles.