guys im due for change oil ngyng katapusan,im planing to switch a different oil. b4 i was using shell helix ultra,then used casa oil fully syn din pero i noticed 5000km p lng grabe sa itim na tska medyo mahal ! now im planning to try mobil 1 semi-syn lng or royal purple oil,saan nga ba makakabili nung royal purple n un (LAS PIņAS AREA AKO) tanx in advance fellow mitsus!!