Which of the following is a preventive measure to ensure fuel system reliability?

Regularly changing fuel filters is a key preventive measure that significantly contributes to fuel system reliability. Fuel filters play a crucial role in removing contaminants from the fuel before it enters the engine components. Over time, filters can become clogged with dirt, rust, and other debris, which can restrict fuel flow and potentially lead to engine performance issues or damage. By routinely replacing the fuel filters according to manufacturer recommendations, you help ensure that the fuel system remains clean and functions optimally, thereby reducing the risk of system failures and extending the life of the vehicle's fuel system.

This proactive maintenance not only aids in the smooth operation of the engine but also minimizes the likelihood of more costly repairs in the future. In contrast, ignoring minor leaks, using low-quality filters, and storing fuel near heat sources can all lead to significant problems, such as increased wear and tear on the system, contamination of the fuel supply, and potential safety hazards, none of which support the reliability of the fuel system.