Chosungira mafuta kapena cholowera mafuta chimalumikiza injector ku makina opaka mafuta ogwiritsidwa ntchito pakati, kupereka mafuta oyera opaka mafuta pa mphamvu yolamulidwa.
Chida choyezera mafuta chimawongolera bwino kuchuluka kwa mafuta omwe amaperekedwa pa nthawi iliyonse kapena pa kusintha kwa makina, kuonetsetsa kuti mafutawo ndi okhazikika komanso osagwiritsa ntchito mafuta ambiri.