ruztynail, from the brochure it says 50L woh ... how did u know when ur indicator light came up u only have 40km left? ... hard to test and confirm le .. unless u r willing to really drive till cannot move then refill lo..

about petrol ron95 and ron97 ... no difference de ... esp for engines now, older carbie engine will have problems such as knocking,etc ... but for persona IAFM it wont have any problem .. ur ECU will tune to burn accordingly ...
performance wise, as long as the engine can drink ron95 it will be already the optimal and pumping ron97 wont have much difference ...

.. those digital stuff not that accurate one la ...
my friend drives a wira which have a 50L tank .... after his indicator is up, he can still drive for 80km .. not sure how many he refill though ....
break the fear, one day try try drive 35km more then only refill ... after that slowly add to 40km, 50km ...