Its really a shame we spent billions to rid gasoline of lead, only to have MTBE put in its place.
The carcinogenicity of MTBE is still in question; the one Italian study that has so far obtained significant results has not been repeated. It's persistence in tissue and groundwater is not in question. Either way, it was a poor selection and in my judgment possibly corrupt. It may have even been a deliberate attempt to grab control of private water wells. To protect the children, you know.