Mimi natumia Castrol oil edge ful SYNTHETIC 5W-30..mara ya Kwanza nilikuwa nimetumia Atlantic 5W-30 fully synthetic lkn bado haiwezi kuifikia Castrol Kwa ubora hata Ile smoothness ya engine imekuwa tofauti.. kumbuka boxer engine XT zinafua joto jingi Sana kwasababu ya turbo ndiyo maana wenyewe manufacturer wamependekeza Castrol oil