I always fill up my tank to the maximum possible.
The main reason I do this is because this tank is too small and I hate going to the gas station too often.
In fact, it is not uncommon for me to fill up much higher than the 51.1 liters they say this tank can hold.
My record regarding this so far is 54.8 liters total. This wasn't a very funny day however since I had to push my Compass up to the pump because I ran out of gas and it took me about half an hour to recuperate because I was totally exhausted.
I laugh at it today but this was a good test and I now know that I don't have any previous warning of the engine when I run out of gas, no hiccups or anything, it just stops and you can try to restart it a dozen time to try to use this little drop of remaining gas there might be in the tank to get you just a little farther but it won't start, not even once. Once it stops, that's it, just get out and push, hehehe.