A yammacin Turai, kasuwa na biyu mafi girma na man fetur a duniya, yawan MTBE a cikin man fetur ya bambanta daga 0 zuwa 15%, ya danganta da darajar man fetur, kamfanin mai, da ƙasa. Misali, 98-99 RON man petrol (high work, super, super plus) na iya ƙunsar 5-13% MTBE, yayin da 92-95 RON grade (premium) ya ƙunshi 0.5-8% MTBE.
Amfani da MTBE a matsayin haɓakar octane a Amurka ya fara ne a cikin 1979. A shekara ta 1990, gyare-gyaren Dokar Tsabtace Tsabtace a Amurka ya buƙaci man oxygenates, kamar MTBE a 15% da ethanol, don ƙarawa zuwa mai a wasu yankuna na birni. gurbataccen iska da carbon monoxide don rage yawan carbon monoxide da ozone. Yankunan da suka zarce ma'aunin ingancin yanayi na yanayi don iskar carbon monoxide ana buƙatar su yi amfani da iskar oxygen a ranar 1 ga Nuwamba, 1992. Duk da fa'idodin amfani da iskar oxygen, an sanya takunkumi kan amfani da shi a yawancin yankuna na Amurka saboda karuwar adadin gano MTBE a cikin ruwan sha sakamakon zubar da tankunan mai na karkashin kasa.