Ans: Gasoline in engine oil is typically not visible to the naked eye. Gasoline, being a liquid, can mix with the engine oil and becomes fully blended, making it difficult to distinguish. Detecting gasoline in oil usually relies on the presence of a strong gasoline odor, changes in oil properties (like thinner consistency), or diagnostic tests, rather than visual inspection. If you suspect fuel contamination, it's crucial to address it promptly through proper diagnosis and maintenance.