jaapv said:As a demonstration Mitsubishi drove a PHEV from Basel to Amsterdam, without charging or filling up. That was 830 km.
https://cleantechnica.com/2014/06/20/mitsubishi-outlander-phev-proves-mpg/
It is all a matter of driving technique.
When I drive long-distance motorways my normal speed is about 140 kph, and the PHEV will do 11 km/l. With a full tank that is well over 450 km, disregarding the battery.