The quality of gasoline and other fuel used in vehicles may vary with some gas stations selling higher quality fuels than other gas stations. This disclosure describes techniques for determining the quality of fuel sold by gas stations using existing vehicle sensors to monitor the fuel composition and combustion. The sensors may include harmonic and fuel sensors, such as water and ethanol sensors. The vehicle may determine the fuel quality by at least applying a machine learning algorithm to the collected combustion and fuel compensation information and/or may send the collected combustion and fuel compensation information to a remote computing system for analysis. After the quality of the fuel is determined, the fuel quality information along with the location at which the fuel was purchased may, after receiving explicit user permission, be automatically shared with other vehicles, a fuel quality monitoring system, or other systems. Other users may use the shared fuel quality information to select where to purchase fuel. In addition, navigation, assistant, or other similar systems may determine which gas stations to recommend based at least in part on the fuel quality information.
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Keys, Sean, "DETERMINING FUEL QUALITY", Technical Disclosure Commons, (December 26, 2021)