I haven't really go empty on mine yet, but last time I checked I was able to do 90Km (56 miles) and still had some fuel left. By my guess, I could have easily reached the 150Km mark.

I've also found the fuel meter to be quite erratic. I just wait until the F-Trip comes on the first time (yes, because if you stop for a while it won't be in reserve anymore...) and then count the Km from there.