Sefa yepeturu inochinjwa riini?
Mafuta emafuta anozosanganiswa nekumwe kusvibiswa panguva yekugadzira, yekufambisa uye kuwedzera mafuta. Kusachena mumafuta kunovharira jekiseni jekiseni, uye tsvina ichabatanidzwa kune inopinza, cylinder madziro uye zvimwe zvikamu, zvichikonzera kabhoni deposition, zvichikonzera kushata kweinjini mamiriro ekushanda. Iyo mafuta sefa chinhu chinoshandiswa kusefa kusvibiswa mumafuta, uye inofanirwa kutsiviwa mushure menguva yekushandiswa kuve nechokwadi chekusefa kwakanaka. Mhando dzakasiyana dzemotokari mafuta sefa kutsiva kutenderera kuchavewo akasiyana zvishoma. Kazhinji, iyo yekunze dhizaini sefa inogona kutsiviwa kana mota ichifamba anenge makiromita 20,000 nguva dzese. Iyo yakavakirwa-mukati mhepo sefa inowanzotsiviwa kamwe pa40,000 km.