How to Remove Engine Sludge?

[ColinRose]

You can use a dedicated sludge cleaning oil. After draining all the engine oil, add the cleaning oil to the engine, let the engine idle for 15 minutes, and then drain the cleaning oil. Here is some extended information about the engine: 1. After prolonged use, a car's engine may develop sludge or internal carbon deposits. However, sludge is harmful to the engine as it can clog the oil passages, affecting the engine's lubrication. 2. The engine contains oil, which needs to be pumped by the oil pump to various parts of the engine that require lubrication. If the oil passages are clogged, the oil cannot reach these parts, which will accelerate engine wear.

[HarperAnn]

I've been driving for decades. Back in the early days when I neglected oil maintenance, the engine accumulated thick black sludge. At that time, I tried a simple method: first drain the old oil, pour in a dedicated engine cleaner, let the engine idle for 10-15 minutes to dissolve the sludge, and then thoroughly replace it with new oil and filter. To prevent this, you must choose high-quality oil and change it regularly every 5,000 kilometers—don't skimp on this cost. If the sludge is too much and stubborn, it's best to take it to a professional repair shop for disassembly and cleaning, otherwise it can easily clog oil passages and damage the engine. When doing it yourself, wear gloves to protect your hands because sludge contains impurities—safety first. Also, remember to check the dipstick regularly and keep it clean.

[StStella]

Having worked in an auto repair shop for many years, I've handled numerous sludge cases. The usual procedure involves adding a chemical cleaner to the engine oil, then running the engine at operating temperature for about half an hour to soften the sludge before draining the oil and replacing it with a new oil filter. It's crucial to check if the oil passages are clear to avoid residual debris. Prevention is key: use synthetic oil to reduce deposits, change oil regularly without exceeding mileage limits, and avoid short trips that can lead to carbon buildup forming sludge. Address sludge signs promptly to prevent damage to internal engine components.

[EliasDella]

I find sludge issues quite annoying. For removal, you can use commercially available engine cleaning additives: pour them into the old oil, run the engine for a few minutes, then change the oil – problem solved. Regular oil changes with quality oil every 5,000 kilometers can prevent it. Simple and quick!