What does it mean when the Mercedes G shows 'Next Refill 1qt Engine Oil'?

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When the Mercedes G displays 'Next Refill 1qt Engine Oil,' it indicates a low engine oil level, and it is necessary to add oil promptly, approximately 6-7 liters. Oil viscosity and quality: Choosing engine oil that matches the vehicle model is crucial. If oil with excessively low viscosity is selected, it will undoubtedly affect the oil's performance, impacting both the vehicle's operation and power output. Additionally, the quality of the oil must be carefully considered, as inferior oil often lacks reliable quality assurance, which may lead to sluggish acceleration without immediate concern. Oil filling quantity: If too much oil is added, the excess can easily enter the combustion chamber (due to excessive internal pressure) and form gummy carbon deposits. While no obvious effects may be noticed initially, over time, the accumulated carbon deposits will worsen, not only affecting the vehicle's overall power performance but also potentially clogging the catalytic converter's pores, leading to excessive exhaust emissions (increased fuel consumption). In severe cases, oil burning may occur.