Fresh gasoline minimizes what issue within the engine?

Fresh gasoline minimizes gum deposits within the engine. Over time, gasoline can oxidize and degrade, leading to the formation of gummy residues. These deposits can accumulate in various parts of the fuel system, including the carburetor and fuel injectors, causing blockages and reducing engine efficiency. By using fresh gasoline, which has not yet undergone oxidation, the risk of gum deposit formation is significantly reduced, allowing the engine to operate more smoothly and effectively.

In contrast, while other issues like vibration, fuel loss, and carbon buildup can be affected by fuel quality and engine condition, they are not directly minimized by the freshness of gasoline in the same manner as gum deposits.