Can OBD Fuel Savers Really Save Fuel?

[Joan]

OBD fuel savers cannot save fuel, here are the specific reasons: 1. OBD fuel savers cannot modify the core data of the vehicle's ECU. 2. Reprogramming a car's ECU requires professional computer programs and experimental models to simulate the data. OBD fuel savers can only receive and send signals and data; they cannot decrypt the manufacturer's encrypted data and, in reality, have no fuel-saving effect. 3. Even if OBD fuel savers were effective, the adjusted data might affect the engine's normal operation. If the adjusted fuel injection quantity is insufficient, it could lead to insufficient power. If the mixture is too rich, it could increase carbon deposits. If the ignition timing is too retarded, it could result in poor power, and if it's too advanced, it could cause knocking and cylinder damage.