http://articles.mercola.com/sites/articles/archive/2008/01/02/traces-of-gasoline-additive-found-in-humans.aspxInvestigators found two metabolites (break-down products) of MTBE in men who volunteered to inhale small quantities of the additive. Throughout the world, MTBE is combined with gasoline to add extra oxygen, which makes fuel burn more cleanly and reducesenCommunityServer 2008.5 SP1 (Build: 31106.3070)