Igice cya gatatu cy'amavuta yo kuyungurura ibice, bizwi kandi nk'ibice bitatu by'amavuta yo kuyungurura ibice, ni igikoresho cyabugenewe cyo guhindura filtri ya peteroli muri moteri yimodoka. Mubisanzwe biranga urwasaya eshatu rushobora gukosorwa no gukuraho muyungurura ubunini butandukanye. Iki gikoresho gikoreshwa mubisanzwe muguhindura amavuta murwego rwo koroshya kuvanaho no gushiraho amavuta yo kuyungurura.
Ibiranga amavuta atatu-yamavuta agizwe nibi bikurikira:
Mugihe ukoresheje ibice bitatu byamavuta ya jaweri, menya neza ko urwasaya rwahinduwe neza mubunini kugirango ruhuze akayunguruzo, gufatanye neza no gukoresha imbaraga zikwiye zo gukuraho cyangwa gushiraho akayunguruzo. Iki gikoresho kirashobora gufasha koroshya amavuta yawe kubungabunga byoroshye, kwemeza ko moteri yawe ikora neza kandi igakomeza imikorere myiza.