Veronica Beagle is the managing editor for Education at Forbes Advisor. She completed her master’s in English at the University of Hawai‘i at Mānoa. Before coming to Forbes Advisor she worked on ...

You might have noticed that some gas stations occasionally offer specials on unleaded 88 octane gas—also known as E15—which contains 15 percent ethanol. Ethanol is an alcohol that’s derived from corn.