Automotive oil additive, cleans and flushes internal oil systems to remove deposits and improve compression. Liqui Moly Engine Flush promises quieter running and reduced oil consumption for petrol and diesel engines. Is adding a single can to routine maintenance worthwhile for long-term engine health?
⚡ At a Glance
- • Cleaning Performance: Concentrated action loosens and removes deposits from internal oil pathways
- • Best for: Car owners and independent mechanics aiming to restore oil flow and compression
- • Not ideal for: Users seeking multi-purpose additives that combine cleaning with long-term lubrication enhancement
Concentrated 500 ml formulation treats oil systems up to 5 litres, reaching lubrication holes, oil screens and piston-ring zones. Helps reduce engine noise and oil consumption while improving compression.
Quieter running and improved throttle response, thanks to removal of deposits from lubrication passages
Designed to clean and flush oil systems, the 500 ml concentration reaches lubrication holes and oil screens to remove accumulated deposits that restrict oil flow. Deposits that block passages are loosened and carried away during the flush process.
Reduced mechanical noise and crisper response follow once oil flow is restored through previously blocked passages, improving everyday drivability.
Lower oil consumption, with thorough cleaning of piston-ring zones
Targeted action reaches piston-ring zones where deposits commonly cause oil to migrate into combustion chambers. Removing those deposits helps restore the sealing action of rings and improves oil control.
Less frequent top-ups and steadier oil levels are likely after a successful flush, beneficial for older engines showing increased oil use.
Restored compression and longer-term engine reliability, thanks to removal of internal deposits
Clearing deposits from piston-ring areas and oil screens supports better compression by enabling correct ring movement and consistent lubrication to critical surfaces. Improved oil circulation reduces risk of local overheating and wear.
Compression recovery leads to smoother idle and more consistent power delivery, helping extend service intervals and engine life when used as part of regular maintenance.
✨ The 4 Key Reasons for Liqui Moly Engine Flush
- 500 ml coverage up to 5 litres - Restores oil flow in mid-size engines during a single flush
- Compatible with petrol and diesel engines - Cleans lubrication systems across common UK engine types and sizes
- Targets lubrication holes and oil screens - Removes deposits that block oil passages and reduce flow
- Reduces engine noise and oil consumption - Helps restore compression and responsiveness for smoother driving
📋 Technical Details at a Glance
- Category: Automotive Parts and Accessories
- Brand: Liqui Moly
- Volume: 500 ml
- Suitable for: Petrol and diesel engines
- Coverage: Sufficient for up to 5 litres of oil
❓ Frequently Asked Questions
Q: Can this be used in both petrol and diesel engines?
A: Yes, the formulation is suitable for use in petrol and diesel engines, according to the product description and user feedback.
Q: How much oil can one 500 ml can treat?
A: One 500 ml can is sufficient for up to 5 litres of oil, as stated in the product information.
Q: What does the flush remove and what are the expected effects?
A: The flush removes deposits from lubrication holes, oil screens and piston-ring zones, which can reduce engine noise, lower oil consumption and improve compression.
🏆 Our Verdict
Suited to owners and independent workshops wanting to clear internal oil deposits and improve engine performance, especially on ageing engines. Concentrated 500 ml formulation reaches lubrication holes, oil screens and piston-ring zones to reduce noise and restore compression. While not a substitute for mechanical repair, regular flushing can be a cost-effective maintenance step that supports long-term engine health.
