Ntchito ya valavu yoyang'anira mafuta pamagalimoto ndikuwongolera kuthamanga kwamafuta ndikuletsa kuthamanga kwamafuta a pampu yamafuta kukhala okwera kwambiri. Panthawi yothamanga kwambiri, mafuta a pampu ya mafuta mwachiwonekere ndi aakulu, ndipo kuthamanga kwa mafuta kumakhalanso kwakukulu kwambiri, panthawiyi, ndikofunikira kulowererapo pakusintha. Kuwotcha mafuta kumapangitsa kuti mafuta oyaka moto apangitse kuti sensa ya oxygen yagalimoto iwonongeke mwachangu; Kuwotcha mafuta kumabweretsa kuwonjezereka kwamafuta, kutulutsa mpweya wambiri, kuthamanga kosasunthika kosagwira ntchito, kumawonjezera ngozi zobisika zagalimoto, ndikuwonjezera mavuto azachuma. Kuwotcha mafuta kumabweretsa kuwonjezeka kwa mpweya m'chipinda choyatsira injini, kuthamanga kofooka, kuthamanga pang'onopang'ono, kusowa mphamvu ndi zotsatira zina zoipa.
