◆ Ngokuhambisana ne-API VG yekhwalithi yeJalimane, ikhiqizwa ngokusebenzisa uwoyela obhakiwe ophumile kanye nezithako ezisezingeni eliphezulu. ◆ Uwoyela obhakiwe ophakeme uhlanganiswe nezithako ezihlukahlukene eziphumile. ◆ Emaphutheni okuphuka, ubukhulu bokuhamba kowoyela kanye nobukhulu bowoyela obhakiwe kugcinwa ukuze kuncishiswe ukugqwala kwezingxenye ezihambayo. ◆ Ukuqina okuhle kokuphenduka kanye nokuzinza kokushisa kwemikhiqizo yowoyela kwenza kube nzima ukuba kube nokonakala ngaphansi kwezimo zokusebenza ezinzima. ◆ I-stalviscosity index iphakeme, ukuhamba kokushisa okuphansi kuhle, ibanga lokushisa elisebenzayo libanzi. Ukuhamba okuhle, ukuphuma kokushisa okuhle, gwema ukushisa okukhulu kwesistimu, ukugqwala kwezingxenye zemishini. ◆ Ukusebenza kokuphakela okuthuthukisiwe kuthuthukisa ukudluliswa kwamandla okuhamba kahle nokuzinzile kwesistimu ye-hydraulic. ◆ Ikhwalithi yezinto zokuvikela ukugqwala, zokuvikela ukuvuvukala nezokufaka zihambisana.