Manual says capacity is 6.6US GAL.
Is all of that usable, or is there a 1qt sump where water/debris can settle that is unusable.
Today I rode past 0mi left because I was very close to home, and I'll get to find out exactly what "usable capacity" is someday, but I thought I would ask for those that have been there. I cant believe that there is no un-usable volume.
For the thread: BMW calls "usable" 25l. (~6.6USG) and reserve is an additional 4l (~1USG)
I got in 5.9 US GAL. So "0" miles left hints to me I have 6L (1.5USG) remaining, and no, I dont want to bank on it, but knowing will help for when you are on "that ride" and the gas station the highway sign said was there, isnt.
Secondary question. I did this on my diesel tanks to get another 5-6gallons into them, and it helped with the long trips.
Has anyone (at the red dot location) vented the neck to add what may be another 2-3l of fuel?