Best tank of gas- 649 km

this is my second tank of gas and best mpg, 649 km.

I drove until the light was flashing and the range was at 18km, than it suddenly it just jumped to 0, soo i panicked and drove to the gas station right away.

The whole tank was driven 90% of the time in ECO mode and 10% in normal mode, never was it in power mode.

Anything else you guys can think about that I can do to increase my mpg, please let me know

thanks

 

mods please delete my last 2 post, my browser froze and i didn't realize i posted 3 times, sorry guys