Mafuta akashandiswa, anonziwo mafuta ekuzora, akasiyana muchina, mota, ngarava kutsiva mafuta ekuzora, mukuita kwekushandiswa nekusvibiswa kwekunze kuburitsa huwandu hukuru hwe chingamu, oxide uye nekudaro kurasikirwa nekuita. Zvikonzero zvikuru: Chekutanga, mafuta ari kushandiswa anosanganiswa nehunyoro, guruva, mamwe mafuta akasiyana-siyana uye simbi poda inogadzirwa nemagetsi kupfeka, zvichiita kuti mutema mutema uye viscosity yakakura. Chechipiri, mafuta anowedzera nekufamba kwenguva, achigadzira organic acids, colloid uye asphalt-like zvinhu.