Original MANN-FILTER Oil filter WP 931 – For Passenger Cars and Utility Vehicles

Overview

The MANN‑FILTER Oil filter WP 931 is a high‑performance filtration solution engineered for passenger cars and utility vehicles. Designed with precision, it delivers reliable protection for the engine’s lubrication system by trapping contaminants while maintaining optimal oil flow.

Design & Construction

The filter features a robust steel housing that resists corrosion and withstands high operating temperatures. Inside, a multi‑layered media assembly—comprising a pre‑filter, a fine filtration core, and an outer protective layer—captures particles as small as 0.5 µm. The sealed construction prevents oil leakage, ensuring consistent performance throughout the vehicle’s service life.

Performance Characteristics

• High Flow Rate: Engineered to maintain a flow rate of up to 3.5 L/min, minimizing pressure drop and preserving engine efficiency.
• Extended Service Life: Capable of operating for up to 10,000 km (or 12 months) under normal driving conditions before requiring replacement.
• Superior Contaminant Capture: Removes oilborne particles, sludge, and rust flakes, thereby extending the life of bearings, pistons, and camshafts.
• Temperature Resistance: Maintains structural integrity up to 200 °C, protecting against thermal degradation.

Compatibility

The WP 931 is specifically tailored for a wide range of vehicles. It matches the following engine families and models:

• Fiat, FSO, and other European passenger cars with displacement ranges from 1.0 L to 2.3 L.
Utility vehicles and light commercial trucks that employ similar oil systems.
• Engine types: inline‑4, inline‑5, and inline‑6 configurations.

Installation Procedure

Installing the MANN‑FILTER WP 931 is straightforward:

1. Remove the old filter by unscrewing it counterclockwise. Dispose of the used oil responsibly.
2. Clean the mounting surface to ensure a tight seal.
3. Screw in the new filter clockwise until snug, but avoid overtightening to prevent damage to the threads.
Check for leaks after starting the engine and verify that oil pressure remains within manufacturer specifications.

Maintenance & Care

While the WP 931 is designed for longevity, regular checks are recommended:

• Inspect the filter housing for cracks or corrosion every 5,000 km.
• Verify oil level and quality after each service interval to ensure optimal filtration performance.
Replace the filter at the end of its rated life cycle to avoid contamination buildup.

Technical Specifications

Conclusion

The MANN‑FILTER Oil filter WP 931 exemplifies engineering excellence for both passenger cars and utility vehicles. Its durable construction, high flow capability, and proven contaminant removal make it a dependable choice for maintaining engine health over extended periods. By integrating this filter into your vehicle’s maintenance routine, you safeguard critical components and promote long‑term reliability.