Emm ....... bad news, Sinopec has cancelled the $1.8 discount, and only offer $0.86 discount, some selected Sinopec stations (屯門屯仁街, 元朗林錦, 大埔汀太路) offered $1.5 discount.
Just been to PetroChina to fill-up the tank with $1.8 discount, currently the Bravo is getting 8.1 Litre / 100km in either Sinopec or Shell normal petrol, will report back on the quality & feel of the PetroChina fuel.