crap fuel from a poor country! i had been using esso since 2005 and i had no doubt for their fuel quality. before this (likely last month) my car had some check valve problem, fuel pump inconstant pressure, too many back fires and my injectors are clogged. been treated with fuel treatment, the symptoms like half treated well.... then i try to pump full tank of petronas ron 95 fuel and the symptoms above are gone! fyi am driving a subaru impreza and my car is so sensitive to fuel quality (due to tuned ECU + unichip piggyback).... crap petron! now am missed so much my red ron 95 and purple ron 97 colour