Izihlungi zikawoyela azikho emhlabeni wonke. Isihlungi sikawoyela sisusa ukungcola okuyingozi emafutheni adonswe epanini likawoyela, bese sinikezela ngamafutha ahlanzekile ezingxenyeni ezihambayo ezifana ne-crankshaft, izinduku zokuxhuma, i-camshaft, i-supercharger, namasongo e-piston, sihlinzeka ngokuthambisa, ukupholisa, nokuhlanza, ngaleyo ndlela sandise ukuphila kwalezi zingxenye. Izihlungi zikawoyela zihlukaniswa ngesakhiwo zibe izinhlobo ezishintshwayo,{2}}ezivuliwe, kanye ne-centrifugal.
Izihlungi zikawoyela ngokuvamile zitholakala emhlabeni wonke kulo lonke uchungechunge lwezimoto. Amamodeli ahlukene adinga izinhlobo ezihlukene zokuhlunga. Ukufaka ngenkani isihlungi sikawoyela esingahambelani kungalimaza injini futhi, ezimeni ezimbi kakhulu, kubangele ingozi yomgwaqo.
Isihlungi sikawoyela sisusa ukungcola, ama-colloid, namanzi kuwoyela wenjini, siletha amafutha ahlanzekile ezingxenyeni ezihlukahlukene ezigcotshisiwe. Ukuze kuncishiswe ukungqubuzana phakathi kwezingxenye zenjini ezinyakazayo futhi kuncishiswe ukuguga, uwoyela ulethwa ngokuqhubekayo endaweni engqubuzanayo yalezi zingxenye ezihambayo, enze ifilimu yokugcoba. Uwoyela wenjini ngokwemvelo uqukethe inani elithile lama-colloid, ukungcola, amanzi, nezithasiselo.
Izikhawu zokushintsha isihlungi sikawoyela:
Amafutha amaminerali:Shintsha ngemva kwamakhilomitha angu-3,000 kuya kwezi-4,000 noma njalo ngemva kwezinyanga eziyisithupha.
Uwoyela-wokwenziwa ongamasentimitha angu-10:Shintsha ngemva kwamakhilomitha angu-5,000 kuya kwangu-6,000 noma njalo ngemva kwezinyanga eziyisithupha.
Amafutha okwenziwa ngokugcwele:Shintsha njalo ezinyangeni eziyisishiyagalombili noma njalo ngamakhilomitha angu-8,000 kuya kwangu-10,000.
