Which type of fuel is known to increase engine deposits if used inappropriately?

Using ethanol-blended fuel can lead to an increase in engine deposits if it is not used in accordance with manufacturer recommendations or if the vehicle is not designed to handle such fuel blends. Ethanol, particularly in higher concentrations, can attract moisture and may be less stable than traditional gasoline. This instability can cause the fuel to break down more quickly, leading to the formation of deposits in the fuel system and combustion chamber, as well as potential phase separation in the tank.

Engines not specifically engineered for ethanol-blended fuels may experience issues such as fuel line corrosion and build-up of deposits on injectors and valves, due to the different combustion characteristics and chemical interactions that ethanol has with engine components. Therefore, it's essential to use the appropriate blend of fuel suitable for the engine to prevent these adverse effects.