Sefa yotsekeka yamafuta imatha kupangitsa kuti mphamvu zichepe, kuvutikira kuyamba, kusagwira ntchito movutikira, kugwiritsa ntchito mafuta ambiri, komanso kuchuluka kwa ma depositi a kaboni. Zikavuta kwambiri, zimatha kulepheretsa injini kuyamba. Izi ndichifukwa choti chotsekeracho chimalepheretsa kupezeka kwamafuta, zomwe zimakhudza kuyaka bwino.
Sefa yotsekeka yamafuta imatha kupangitsa kuti mafuta asakwane, zomwe zimakhudza kuyatsa kwa injini, zomwe zimapangitsa kuchepa kwa mphamvu komanso kuchuluka kwamafuta. Kutseka-kwanthawi yayitali kungayambitsenso kuyika kwa kaboni pa ma jekiseni amafuta, kugwedezeka kwa injini, ngakhalenso kuyimitsidwa. Zosefera zamafuta zomwe timapereka zimapangidwa ndi pepala losefera magalasi ndi kusefera kolondola kwa 1-50μm, kutsekereza zonyansa. Amagwira ntchito pa kutentha kwa madigiri -10 mpaka 130 digiri ndipo ndi oyenera mitundu yosiyanasiyana yamakina omanga ndi makina a hydraulic.
