![Is an Engine Flush Good or Bad?](https://blog.amsoil.com/wp-content/uploads/2018/11/Flush_Engine_1200px.jpg)
![](https://blog.amsoil.com/wp-content/uploads/2018/11/Flush_Engine_1200px.jpg)
Is an Engine Flush Good or Bad?
An engine flush will often improve engine performance, but you may want to skip it with old, high-mileage engines.
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