Can You Use Different Viscosity Engine Oil for Topping Up?

Learn why topping up engine oil with a different viscosity could harm your engine's performance and how to choose the right oil.

Published Jul 18, 2025

Overview

In this informative video, we address the common question, 'Is it okay to top up engine oil with different viscosity?' Understanding engine oil viscosity is crucial for maintaining optimal engine performance and longevity. Viewers will gain insights into why using oil of varying viscosities can impact engine protection and performance negatively, emphasizing the importance of adhering to manufacturer guidelines.

Video transcript

It is generally not advisable to top up engine oil with a different viscosity as it can affect the performance and protection of your engine. Always refer to your vehicle's owner manual for the recommended oil type and viscosity, and consult a professional if mixing oils becomes necessary.

Questions and answers

Can I mix different viscosities of engine oil?
Mixing different viscosities of engine oil is generally not recommended, as it may compromise engine performance and protection.
How do I know what viscosity oil to use in my vehicle?
Refer to your vehicle's owner's manual for the manufacturer-recommended oil type and viscosity.
What should I do if I accidentally topped up with the wrong oil?
If you've topped up with the wrong viscosity, it's best to consult a professional mechanic to assess the situation and recommend the appropriate action.
What are the risks of using the wrong engine oil?
Using the wrong engine oil can lead to reduced engine performance, increased wear and tear, and potential engine damage over time.