Car Q's: How do I know if there is oil sludge in my vehicle engine? - Qs and As

Question: How Do I Check My Car Engine for Oil Sludge (slush)?

Answer:

Open your vehicle bonnet (hood) and look for the oil-filler cap.
Open the oil cap and insert your index finger to make a L shape or scrub around the area.
If there is any pasty-like dirt or semi-solid oil sediments or black gel, then your car has sludge.
Call a professional auto technician or vehicle mechanic to have a look and desludge or flush the engine.