Vehicles using M25/659 engine list:
Recommended oil for engine M25/659 engine.
Ask AI about any Engine code
Questions strictly about engine codes (brand/model/engine type/production years).
Oil specification key
✔ – Meets the required specification
❓ – Not explicitly stated (use caution; check your vehicle manual)
❌ – Does not meet required specification. Use may cause engine issues.
✔ – Meets the required specification
❓ – Not explicitly stated (use caution; check your vehicle manual)
❌ – Does not meet required specification. Use may cause engine issues.
Answer generated by AI.
Oil specifications for M25/659 engine
SAE 10W-40
ACEA A3/B3
API SJ
Most common problems, symptoms & fixes for the M25/659 engine.
Engine M25/659 in the Citroen CX 25 (1984–1992) commonly faces issues like oil leaks, worn timing belts, and cooling system failures. For diagnosis, regularly check for oil spots under the car and inspect the timing belt for cracks or wear every 60,000 km. Overheating signs indicate potential radiator or water pump problems. Prevention includes timely oil changes with quality oil, replacing the timing belt per schedule, and flushing the cooling system periodically. Solutions involve sealing oil leaks with new gaskets, replacing the timing belt and tensioner, and repairing or replacing faulty cooling components to avoid engine damage and ensure longevity.