What is a common issue with aged fuel lines?

A common issue with aged fuel lines is cracking or deterioration. Over time, fuel lines, especially those made from rubber or plastic, can degrade due to exposure to various environmental factors, such as heat, UV light, and the chemicals present in the fuel. This degradation can lead to cracks or fissures in the material, which may result in fuel leaks, posing a safety hazard and potentially leading to engine performance issues.

While corrosion of metal lines is a concern, this typically affects specific types of metal fuel lines rather than being a universal issue with all aged fuel lines. Clogging due to debris can occur, but it is more related to the condition of the fuel being used or the fuel filter than the age of the lines themselves. Loss of color, while it may happen to certain types of materials, is not indicative of functionality or safety issues. Thus, the deterioration and cracking of fuel lines is the most critical and direct consequence of aging in fuel system components.