What happens if too much engine oil is added to a car?

1 Answers
VanLillian
07/29/25 3:50pm
If too much engine oil is added to a car, it will increase fuel consumption. During operation, the crankshaft and connecting rod big end will experience intense agitation, leading to increased internal power loss in the engine. Additionally, more oil will splash onto the cylinder walls, potentially causing oil burning and exhaust issues. Therefore, the oil level should be maintained between the upper and lower marks on the dipstick. Below is some relevant information about engine oil: 1. Since engine oil significantly impacts the performance and lifespan of the engine, it is crucial to strictly follow the vehicle's user manual to select oil of the same series, service grade, and viscosity grade. The oil recommended in the manual is based on the engine's performance and the ambient temperatures of the sales region, providing essential guidance for oil selection while maintaining a considerable safety margin. It is also one of the prerequisites for warranty claims during the engine's warranty period. 2. Choose the viscosity grade according to the engine's technical characteristics. For new engines, oil with lower viscosity should be used to ensure proper running-in during the initial usage period. For older engines with significant wear, oil with higher viscosity is recommended to maintain the required oil pressure and ensure proper lubrication.
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