Sydney driver here with 155... I drive spirited and recently got 400km out of a tank... But that was also because we were stuck in a bad traffic jam for a few hours one day....

Normally I can get anywhere from 430 to 500 depending on my driving...

Average drive is 10kms at avg of 40km/h because of lights and old drivers etc.... I am pretty heavy footed... like "wish my car was a Golf R" heavy footed......