How Many Times Should the Engine Oil Be Changed After Water Intrusion?

[LeVivian]

Engine oil should be changed twice after water intrusion. Here are the specific details about the engine: 1. Definition: An engine (Engine) is a machine capable of converting other forms of energy into mechanical energy. 2. Internal components: It includes internal combustion engines (reciprocating piston engines), external combustion engines (Stirling engines, steam engines, etc.), jet engines, electric motors, etc. For example, internal combustion engines typically convert chemical energy into mechanical energy. Engines can refer to both power-generating devices and the entire machine including the power unit (such as gasoline engines, aircraft engines).

[CassandraDella]

That day my car's engine got flooded after driving through water, and I was extremely worried, so I immediately asked a friend for help. Water entering the engine can cause the oil to emulsify, leading to lubrication failure, and in severe cases, it can cause cylinder scoring or even total engine failure. The number of oil changes needed depends on how severe the water ingress is: if only a small amount of water got in, one oil change might suffice; but if a lot of water entered, especially if you attempted to start the engine, you’ll need two or more oil changes to thoroughly flush out the contaminants. In my case, I changed the oil twice—after the first change, the oil was still milky, so I had to change it again before it became clear. Never attempt to start the engine to avoid internal damage; towing it to a professional repair shop is the safest option. When driving, avoid forcing your way through deep water—always check the depth before crossing to save yourself major trouble.

[DelAdrian]

As a car repair enthusiast, I believe engine water ingress must be taken seriously. Water mixing with engine oil forms an oil-water emulsion, losing its lubricating properties and causing friction damage between pistons and cylinder walls. Changing the oil is the top priority: minor water ingress only requires a single oil change, but all old oil must be thoroughly replaced and the filter cleaned. For severe water ingress or after engine startup, two or more oil changes are necessary to ensure all moisture is expelled. A single incomplete oil change may leave residual corrosive substances. I recommend briefly testing the engine after an oil change to check for abnormal noises and inspecting the cooling system and air filter for any impact. Prevention is better than cure—avoid deep water when driving in rain, and maintaining a high-point design for the engine exhaust system can prevent water ingress.

[VonEmiliano]

After years of driving, when it comes to water in the engine, there's only one word: replace! Once water enters the engine and contaminates the oil, the oil must be changed. Normally, it's changed once or twice—the first change removes most of the contaminants, and if the oil level appears cloudy or abnormal upon inspection, a second change is necessary to ensure safety. Never attempt to start the engine; let a technician inspect and change the oil, along with flushing the oil system to prevent rust. Water ingress can lead to long-term issues like oil leaks or piston seizure. After treatment, regularly check the oil condition to extend engine life. Taking prompt action after driving through water is crucial.