Purpose and Specifications

LIQUI MOLY 3667 Central Hydraulic System Oil 2500 is a fully synthetic green hydraulic oil in a 1-liter tin, specially formulated for central hydraulic systems in PSA (Peugeot/Citroen) and Renault vehicles meeting LDS, PSA S71 2710, and Renault PSF Class 1 specs. It delivers outstanding protection for power steering, braking, and suspension systems, ensuring smooth operation from -45°C cold starts to high-heat conditions without breaking down. This oil fights corrosion, prevents wear on pumps and valves, stops foam and sludge buildup, and keeps systems reliable to cut repair costs and downtime.

When to Use / Replace?

Use this oil during hydraulic system flushes or top-ups in compatible vehicles to maintain peak performance. Replace every 60,000 km or 24 months, or sooner if fluid looks dark, smells burnt, or steering feels stiff. Its long shelf life of 5 years unopened ensures it's ready when needed. Ideal for daily drivers and heavy-use fleet vehicles in varying climates.

Frequently Asked Questions

Q: Is this oil safe for my Peugeot or Citroen power steering?
A: Yes, it matches PSA S71 2710 exactly, providing smooth steering and pump protection down to -45°C.

Q: How often should I change the hydraulic fluid?
A: Check your owner's manual, but typically every 60,000 km or 2 years to avoid costly pump failures.

Q: Can I mix it with other hydraulic oils?
A: Best results unmixed, but safe for top-ups in systems calling for LDS or similar specs.