Cholembera cha injini zamafuta ndi fayilo yamafuta yamafuta. Ntchito ya zosefera zamafuta mafuta ndikuzisefa mandewa, ma colloids ndi chinyezi mu mafuta a injini ndikupereka mafuta oyeretsa mafuta onse.
Pofuna kuchepetsa mikangano pakati pa magawo osunthika mu injini ndikuchepetsa kuvala mbali, mafutawo amayendetsedwa mosalekeza kupita ku mikangano ya gawo lililonse kuti apange firifi yopaka mafuta. Mafuta amagetsi ali ndi chingamu, zosayera, chinyezi komanso zowonjezera. Nthawi yomweyo, panthawi yogwira ntchito injini, kuyambitsa chitsulo, kulowa zitsulo kumabzala, kulowa kwa manderker mlengalenga ndipo m'badwo wa mafuta obiriwira kumawonjezera manderi am'madzi. Ngati mafutawo sanasefedwa ndikulowa mwachindunji ndi mafuta opangira mafuta, machekenti omwe amapezeka mu mikangano adzabweretsedwa mu gulu la awiriwo, limakufulumize kuvala ziwalo ndikuchepetsa moyo wa injini.
Chifukwa cha ufa waukulu wamafuta pawokha ndi zinthu zapamwamba za zosayera mu injini zamafuta, kuti mafuta osefedwa, injini yamafuta a injini, injini yamafuta osefera sefa fitory. Wosambira amaikidwa mu poto wamafuta pamaso pa pampu yamafuta ndipo nthawi zambiri amasunga mtundu wa chitsulo. Zosefera zamagetsi zoyambira zimayikidwa kumbuyo kwa pampu yamafuta ndikulumikizidwa pamindandanda ndi gawo lalikulu lamafuta. Zimaphatikizapo zotupa zachitsulo, zosefera za utoto ndi pepala la microweroment. Tsopano pepala losefera limagwiritsidwa ntchito makamaka. Zosefera bwino mafuta zimayikidwa kumbuyo kwa pampu yamafuta ndipo cholumikizidwa chofanana ndi gawo lamafuta, makamaka kuphatikiza mapepala osefera mapepala ndi mtundu wa rotor. Zosefera mafuta a rotor
