I have a 2016 825i, so close but not identical. Recently I'm getting around 15mpg, using corn-free gas. That said, my clutch is on it's way back from Doc as we speak, so maybe the lower rpms and such will help with efficiency. Then again, I don't pay that much attention to the mpg. Well I didn't, until you started this thread. Damn it...Had anyone calculated the MPG of a Deere 835M?
If so what did you come up with?