Liqui Moly Pro-Line Oil Loss Stop sits in the automotive additives category, promising to regenerate seals and reduce oil consumption for petrol and diesel engines. Drivers and workshops wanting a straightforward fix for seepage will welcome a product that mixes with any commercial engine oil. Will the claimed sealing action after 600–800 km match real-world repairs?
⚡ At a Glance
- • Sealing Action: Regenerates rubber and plastic seals, effective after 600–800 km
- • Best for: Owners and professionals treating oil leaks and excessive consumption
- • Not ideal for: Mechanical failures that require seal replacement or machining repairs
Suitable for petrol and diesel engines, compatible with engines fitted with a diesel particulate filter. One litre treats up to 15 litres of engine oil and should show sealing action after 600–800 km.
Stops visible oil leaks - thanks to seal regeneration
Regenerates rubber and plastic engine seals, including shaft seals and valve stem seals, by integrating with the engine oil formulation. Sealing action is reported to occur after 600–800 km of normal running.
Visible seepage and small leaks can be reduced without immediate disassembly, restoring sealing function over a few hundred kilometres.
Reduces oil consumption - with uniform viscosity
Adds to engine oil to create a more uniform viscosity that reduces oil passage through piston rings, and regenerates seals around valve guides to limit guide-related losses.
Oil top-ups will be needed less often as oil loss through rings and guides declines, helping maintain correct oil levels for longer periods.
Simple workshop application - with broad compatibility
Mixes with all commercial engine oils and can be added at any time, one litre being sufficient for up to 15 litres of motor oil. Engine should be run until warm or driven after adding to help distribution.
Fits easily into regular servicing routines and is suitable for common oil capacities, making application straightforward for garages and competent vehicle owners.
✨ The 4 Key Reasons for Liqui Moly Pro-Line Oil Loss Stop
- Seal regeneration - Restores rubber and plastic seals, reducing visible oil leaks within 600–800 km
- Uniform viscosity - Lowers oil seepage through piston rings, reducing top-up frequency
- Wide compatibility - Mixes with all commercial engine oils, safe for petrol and diesel engines
- One-litre coverage - Treats up to 15 litres of motor oil, suitable for most service fills
📋 Technical Details at a Glance
- Category: Automotive additive
- Brand: Liqui Moly
- Product ID: B004FQ031G
- Contents: 1 litre
- Suitable for: Petrol and diesel engines, with or without DPF
❓ Frequently Asked Questions
Q: Can Liqui Moly Pro-Line Oil Loss Stop be used in engines with a DPF?
A: Yes, suitable for both petrol and diesel engines with or without a diesel particulate filter.
Q: How much engine oil does one can treat?
A: One litre is sufficient for up to 15 litres of motor oil.
Q: When will sealing benefits appear after adding?
A: Sealing action is expected after approximately 600–800 km of engine running following application.
🏆 Our Verdict
Suitable for workshops and vehicle owners seeking to address leaks and reduce oil consumption without immediate disassembly. The key strength lies in regenerating rubber and plastic seals and reducing oil loss through more uniform viscosity, while remaining compatible with commercial oils. When used as part of regular maintenance, lower oil consumption can reduce running costs over time.
