Alcohol Blend Fuel Economy Gasoline Industrial 
Green Car Congress
MARCH 27, 2020
Co-Optima estimations indicate that significant fuel economy improvements are possible with improvements to RON, S, and HOV. The report highlights researchers’ answers to three vital questions: What fuels do engines want? What Fuels Should We Make? industry, educational institutions, and nonprofits.
Green Car Congress
AUGUST 30, 2009
In 1975, General Ernesto Geisel, then-president of Brazil, ordered the country’s gasoline supply mixed with 10% ethanol. The level was raised to 25% over the next five years, which was intended to maintain a constant Brazilian gasoline supply for an ever-increasing demand. These were arguably the first flex-fuel vehicles.
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