Which cleaning agent is recommended for use on aircraft engines?

Using a fine spray of kerosene is recommended for cleaning aircraft engines because it effectively dissolves grease, oil, and other contaminants commonly found in engine environments. Kerosene is a hydrocarbon that is less aggressive than many other solvents, making it safe for use on various engine components without the risk of damaging delicate materials, gaskets, or coatings. It evaporates quickly, reducing the chances of residual build-up that could affect engine performance.

In contrast, using soap and water may not adequately remove heavy grease and oil deposits, as it could leave behind residues. Alcohol-based cleaners typically evaporate too quickly to allow for thorough cleaning and might not effectively penetrate synthetic oils or other engine contaminants. Acidic cleaning solutions, while effective in some contexts, can damage metal surfaces and lead to corrosion if not rinsed properly, making them unsuitable for use on aircraft engines where the integrity of engine materials is critical.