Bioethanol is an attractive alternative to gasoline in spark ignition engines. In most of the published researches, the ethanol was blended with gasoline in low percentages from 3% to 20%. In the recent study, the impact of using high volume percentages of bioethanol added to conventional Iraqi gasoline on the performance and emitted emissions of a four cylinder Mercedes engine. The results showed that E60 gave the lowest fuel consumption and the highest exhaust gas temperature compared to gasoline and E40. CO and HC levels were reduced by using E40 and E60 blends compared to gasoline while CO2 levels were increased. NOx levels increased with using E40 compared to gasoline while reduced highly with using E60.

Bioethanol is an attractive alternative to gasoline in spark ignition engines. In most of the published researches, the ethanol was blended with gasoline in low percentages from 3% to 20%. In the recent study, the impact of using high volume percentages of bioethanol added to conventional Iraqi gaso...