Mafirita ezvemafuta anoenderera mberi kubvisa pfeka zvimedu, guruva, uye zvigadzirwa zve oxidation kubva kune mafuta ekunyima, kuchengetedza viscosity uye kuita kwakasimba. Ivo vakakosha pakuchengetedza midziyo chaiyo seyemagoni mishonga, masisitimu emapepa, spindles, uye turbines.
