Abstract
<jats:p>The study of biofuels has become a priority research area in the field of mechanical and energy engineering. One of the most accessible and easily implemented biofuels is biogasoline, a blend of gasoline with a percentage of anhydrous ethanol, generally 10%. This type of blend has been introduced in various countries as a strategy to reduce dependence on petroleum and mitigate emissions of polluting gases. In this project, an experimental study was conducted focusing on analyzing the behavior of a 150 cc, four-stroke internal combustion engine operating with conventional 87-octane gasoline and with bio-gasoline. The results obtained show that the use of bio-gasoline allows for higher engine speeds, with a gain of up to 1000 rpm compared to conventional gasoline. However, the frequency spectra show differences in the high-frequency components, which could be related to changes in the combustion pattern or internal resonances of the system. This project contributes to the understanding of the technical impact of using biofuels in conventional engines and promotes the development of sustainable, accessible energy solutions that are compatible with the existing technological infrastructure.</jats:p>