Will switching from 5w40 to 5w30 cause oil burning?

1 Answers
LaMax
07/30/25 7:28am
If the vehicle requires 40 viscosity oil, switching to 30 viscosity oil may lead to oil burning in the engine. Detailed explanation below: 1. Using excessively high viscosity: If the vehicle requires 30 viscosity oil but 40 viscosity oil is used instead, it may result in reduced engine power and increased fuel consumption. 2. Routine maintenance: Always change the engine oil regularly during vehicle use, and replace the oil filter with each oil change. 3. Functions of engine oil: In the engine, oil not only lubricates but also cleans, seals, cushions, prevents rust, and dissipates heat.
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