Ikon surutu yana da mahimmanci a girka yawancin janareto. Akwai hanyoyi da yawa don zaɓar daga don sarrafa matakin amo.

1. Shafin hayaki na hayaki: Mai shan hayakin hayaki zai rage karar karar injin dizal. Matsayi daban-daban na masu shiru suna da tasirin shiru daban-daban. Wadannan masu shiru suna iya kasu kashi hudu: muhallin masana'antu, muhallin gida, bukata mai karfi, da matsananci-bukata.

2. Shell: Aikin harsashi daya ne don hana ruwan sama; dayan kuma shine rage hayaniya. Wadannan bawo za a iya tsara ta musamman don saduwa da buƙatun matakin amo na musamman.

3.Wannan hanyoyin rage amo: Lokacin da aka sanya janareto a cikin gini, akwai kayan aiki na rage hayaniya kamar akwatunan muffler, samun iska, bangare masu sanyawa, da masu sanya murfin bango, wadanda zasu iya rage amo.