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What is the impact of ethanol blended petrol on fuel economy in terms of mileage per gallon (mpg)?

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Ethanol blended petrol can have varying impacts on fuel economy. Studies have shown that ethanol blends can improve combustion efficiency, resulting in increased power output and potentially better mileage per gallon (mpg) due to enhanced air-fuel equivalence ratios . However, the effects on fuel consumption can differ based on the type and blending ratio of ethanol used. For instance, high blending ratios of ethanol in gasoline have been associated with increased volumetric fuel consumption . Additionally, the addition of ethanol to gasoline has led to a certain increase in brake specific fuel consumption in some cases, which can affect the overall mileage per gallon . Therefore, the impact of ethanol blended petrol on fuel economy in terms of mpg is influenced by factors such as the ethanol content and blending ratios used in the fuel mixture.

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Open access•Journal Article•DOI The Impacts of Ethanol - Gasoline Blended Fuels on the Pollutant Emissions and Performance of a Spark - Ignition Engine : An Empirical Study Ümit Ağbulut, Suat Sarıdemir, Gökhan Durucan - Show less +2 more 30 Dec 2018 11 Citations	The addition of ethanol to gasoline leads to an increase in brake specific fuel consumption, potentially reducing mileage per gallon (mpg) due to increased fuel usage.
Open access•Journal Article•DOI Investigation on Blending Effects of Gasoline Fuel with N-Butanol, DMF, and Ethanol on the Fuel Consumption and Harmful Emissions in a GDI Vehicle Haifeng Liu, Xichang Wang, Diping Zhang, Fang Dong, Xinlu Liu, Yong Yang, Haozhong Huang, Yang Wang, Qianlong Wang, Zunqing Zheng - Show less +9 more 15 May 2019-Energies 62 Citations	Blending ethanol with gasoline can increase fuel consumption in a GDI vehicle, impacting mileage per gallon negatively due to higher volumetric fuel consumption compared to pure gasoline.
Journal Article•DOI Influence of ethanol-gasoline blended fuel on performance and emission characteristics of the test motorcycle engine Thanh Dinh Xuan, Dien Vu Minh, Binh Pham Hoa, Khanh Nguyen Duc, Vinh Nguyen Duy - Show less +4 more 11 Apr 2022-Journal of The Air & Waste Management Association 2 Citations	Ethanol-gasoline blends can improve fuel economy due to enhanced combustion, potentially increasing mileage per gallon (mpg) in motorcycle engines, as indicated by the study.
Open access•Journal Article•DOI Impact of adding ethanol to gasoline on greenhouse gas emissions Marcelo de Camargo Jani, Irenilza de Alencar Nääs, André Henrique Ivale - Show less +2 more 04 Nov 2022-Research, Society and Development	Ethanol blended petrol can impact fuel economy by reducing mileage per gallon (mpg) due to increased CO2 emissions at higher speeds, as shown in the study.

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