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.

[DiDaniel]

I previously used engine flush on my old car, thinking it would remove carbon deposits, but it turned out to be a disaster. After the flush, the engine noise increased, the oil light came on, and inspection revealed that loosened sludge had clogged the oil passages, causing inadequate lubrication and nearly burning out the bearings. This kind of DIY operation is high-risk, especially for older cars, as it can trigger more serious malfunctions and compromise driving safety. I ended up spending even more money to have it fixed at a repair shop—totally not worth it. Now I only trust professional maintenance, and regular oil changes have proven to be more reliable and effective. Cars can retaliate if treated too harshly.

[VanLucy]

Cleaning the engine may sound smart, but it actually causes numerous problems. Especially when carbon deposits are stirred up, they can easily get stuck in narrow oil passages, leading to poor lubrication and accelerated component wear. In the long run, seals may be damaged, causing oil leaks and reduced power. Many car owners try it themselves to save money, only to end up with doubled repair costs. I have a friend whose high-mileage car was scrapped because of this. It's recommended to use such products only under professional supervision. Occasional use on new cars might be acceptable, but don't make it a regular habit. For maintenance, sticking to regular oil changes is still the most reliable approach.

[LeHaley]

Oil flushing is not a good thing, especially based on my years of experience driving older cars. It dislodges old carbon deposits, which may clog critical components, leading to insufficient oil pressure and engine overheating. Long-term use can damage seals, causing frequent oil leaks. I've seen a neighbor's car require expensive major repairs due to this. Unless absolutely necessary, don't tinker with the engine. Maintaining the original condition is best; regular oil changes are sufficient for cleanliness. Safe driving is far more important than saving a little money.

[PiperFitz]

Using engine flush is not good for the engine. It removes dirt temporarily but brings annoying consequences. It may clog oil passages, hinder lubricant flow, and cause component jamming, which is especially risky for older cars, such as increased fuel consumption and oil leaks. Improper flushing can also contaminate the system and raise maintenance costs. I've thought about trying it a few times but resisted—now I rely solely on high-quality engine oil for maintenance, which is effective, cost-saving, and safe. Developing good habits and avoiding risks can keep your beloved car running longer and smoother.

[OLiam]

Cleaning the engine poses significant risks. Loosened carbon deposits can easily clog oil passages, disrupt normal lubrication, accelerate component aging, or cause oil leaks, which is detrimental to the overall lifespan. The benefits are minimal, and unless performed by professionals, it's not worth attempting for daily driving. With years of experience in automotive research, I recommend using high-quality engine oil to protect the engine and regularly checking filters. This approach is more reliable, avoids the hassle of cleaning, and ensures safer, more stable driving with fewer unexpected issues.