Fuel quality risks for vehicle engines and hybrid systems

Fuel degradation and adulteration pose significant risks to vehicle engines, affecting both traditional and hybrid models. In hybrid vehicles, particularly plug-in models that rely heavily on electric motors, gasoline can remain in the tank for extended periods. This can lead to natural degradation, oxidation, and moisture absorption—especially in fuels containing ethanol—which may cause corrosion in the fuel system.

Adulterated gasoline, which contains unauthorized substances or impurities like water, can lead to overheating, component wear, and increased pollutant emissions. Drivers may experience symptoms such as difficulty starting the engine, loss of power, and increased fuel consumption due to lower octane levels.

To mitigate these issues, experts recommend using specialized additives designed to protect fuel systems in hybrids and ensuring fuel is sourced from reputable establishments. If adulterated fuel is suspected, it is advised to drain the tank and refill with high-quality, additive-enhanced gasoline before seeking professional mechanical assistance.