What are the consequences of using cleaning oil to clean an engine?

[VanPaislee]

Using cleaning oil to clean an engine can lead to consequences such as engine pre-ignition or engine piston seizure, which may render the engine irreparable if severe. The engine cleaning oils available on the market primarily consist of low-cost mineral oils and a high proportion of detergent dispersants. After cleaning the engine, residual detergent dispersants may remain inside, which can impair the performance of new engine oil, especially in direct-injection engines, where the impact can be critical. An engine is a machine that converts other forms of energy into mechanical energy, originating in the UK. It can refer to both the power-generating device and the entire machine including the power unit. Types of engines include internal combustion engines, external combustion engines, electric motors, and more.