Is it okay to add too much diesel engine oil?

[DelSabrina]

No, it's not okay. The engine has specific requirements for the amount of oil; it cannot be too much or too little. Here are the effects of adding too much oil: 1. Reduced power output and increased fuel consumption: If the crankshaft is mostly or entirely submerged in oil, the resistance it faces increases, which manifests as the engine running sluggishly and with greater resistance. 2. Accelerated carbon buildup: Prolonged burning of excess oil can lead to carbon deposits in the engine. Increased carbon deposits in the combustion chamber result in reduced power and higher fuel consumption. 3. Potential damage to the catalytic converter: More oil entering the combustion chamber worsens exhaust emissions, affecting the lifespan of the catalytic converter. In severe cases, it may even cause the catalytic converter to fail. 4. Faster aging of car components: Excessive oil places extra burden and pressure on various parts. The greater the pressure, the faster the components age. A noticeable example is the crankshaft oil seal, which can age rapidly under high pressure, increasing the risk of oil leaks.