Engine Running Rough or Oil Sludged Up? Liqui Moly Pro-Line Engine Flush 7712 — Remove Deposits & Restore Performance Fast
Built-up sludge, lacquer deposits, and oil contaminants are the leading cause of reduced engine efficiency, increased wear, and premature oil degradation. In most 4-stroke gasoline and diesel engines, deposits accumulate in oil galleries, valve trains, and piston rings over time — especially when oil change intervals are extended or low-quality oil has been used. When deposits build up, oil flow is restricted, combustion efficiency drops, and engine wear accelerates. ⚡ A single flush before an oil change removes years of accumulated deposits and restores full oil flow. Liqui Moly Pro-Line Engine Flush 7712 is the professional-grade solution that dissolves sludge, isolates contaminants, and prepares the engine for fresh oil — restoring performance and protecting long-term engine health.
❓ When Should You Use This?
Use Liqui Moly Pro-Line Engine Flush 7712 when ANY of the following apply:
- ✔ Performing an oil change on a high-mileage vehicle (100,000+ km)
- ✔ Switching oil brands, viscosity grades, or oil types (conventional to synthetic)
- ✔ Engine has been running with extended oil change intervals
- ✔ Oil appears very dark, thick, or sludgy at the drain plug
- ✔ Engine is noisy at startup (lifter tick, valve train noise) that clears after warm-up
🔧 Problems This Fixes
- Lifter tick or valve train noise at cold start
- Reduced fuel economy from restricted oil flow
- Dark, sludgy oil at drain that indicates heavy deposit buildup
- Rough idle or hesitation caused by dirty piston rings
- Premature oil darkening after fresh oil changes
✔ One treatment before an oil change removes accumulated deposits and restores clean oil circulation.
✔ Compatible with diesel particulate filters (DPF), turbochargers, and catalytic converters.
📦 Product Details
- Part Number: 7712
- Brand: Liqui Moly Pro-Line
- Size: 500ml — treats up to 5 litres of engine oil
- Compatible Engines: All 4-stroke gasoline and diesel engines
- Safe For: Turbochargers, diesel particulate filters (DPF), catalytic converters
- Application: Add to old engine oil before draining — idle 10 minutes, then drain and refill
For best results, follow the engine flush with a fresh oil filter and Liqui Moly engine oil matched to your vehicle’s specification. A flush without a new filter leaves the old filter’s captured contaminants in the system — defeating the purpose of the flush. Always replace the filter at the same service.
⚙️ How to Use
Skill Level: Easy — 10 minutes + 10-minute idle. Warm the engine to operating temperature, then shut it off. Add the entire 500ml can of Liqui Moly Pro-Line Engine Flush 7712 to the engine oil via the oil filler cap. Start the engine and idle for 10 minutes — do not drive or rev the engine during this time. Drain the old oil and flush completely, replace the oil filter, and refill with fresh engine oil to specification. Dispose of drained oil responsibly.
💡 Pro Tip
If the engine has never been flushed and has very high mileage with heavy sludge buildup, warm it to full operating temperature before adding the flush — warm oil carries dissolved deposits out more effectively. Also, on severely neglected engines, consider two consecutive flush-and-change cycles spaced 1,000 km apart rather than one aggressive flush, to avoid dislodging large sludge chunks that could temporarily block oil galleries.
✅Compatibility & Cross Reference
Not sure about your model number? Call 1-877-899-7278 and we’ll help you confirm. All brand names are the property of their respective owners and are used for compatibility reference only.
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