Zosefera zamafuta sizipezeka konsekonse. Fyuluta yamafuta imachotsa zonyansa kuchokera kumafuta otengedwa mu poto yamafuta, kenako imapereka mafuta oyera kumalo osuntha monga crankshaft, ndodo zolumikizira, camshaft, supercharger, mphete za pistoni, kupereka mafuta, kuziziritsa, ndi kuyeretsa, potero kumakulitsa moyo wa zigawozi. Zosefera zamafuta zimagawika m'magulu amitundu yosinthika, yozungulira-on, ndi centrifugal.
Zosefera zamafuta nthawi zambiri zimakhala zapadziko lonse lapansi pamagalimoto onse. Mitundu yosiyanasiyana imafunikira mitundu yosiyanasiyana ya zosefera. Kuyika mokakamiza fyuluta yosagwirizana ndi mafuta kumatha kuwononga injini ndipo, pakachitika ngozi, kungayambitse ngozi yapamsewu.
Fyuluta yamafuta imachotsa zonyansa, ma colloid, ndi madzi mumafuta a injini, kubweretsa mafuta oyera kumadera osiyanasiyana opaka mafuta. Pofuna kuchepetsa kukangana pakati pa zigawo zomwe zikuyenda bwino za injini ndi kuchepetsa kutha, mafuta amaperekedwa mosalekeza kumalo ophwanyika a magawo osunthawa, kupanga filimu yopaka mafuta. Mafuta a injini mwachilengedwe amakhala ndi ma colloids, zonyansa, madzi, ndi zowonjezera.
Nthawi zosinthira zosefera zamafuta:
Mafuta a Mineral:Kusintha pambuyo pa 3,000 mpaka 4,000 makilomita kapena miyezi isanu ndi umodzi iliyonse.
Semi-mafuta opangira:Sinthani mukatha makilomita 5,000 mpaka 6,000 kapena miyezi isanu ndi umodzi iliyonse.
Mafuta opangidwa kwathunthu:Sinthani miyezi isanu ndi itatu iliyonse kapena makilomita 8,000 mpaka 10,000 aliwonse.
