Vehicles using M20B25 engine list:
- BMW - 325i (126kW) 1986–1988
- BMW - 325iX (126kW) 1986–1988
- BMW - 325i (126kW) 1988–1991
- BMW - 325iX (126kW) 1988–1991
Recommended oil for engine M20B25 engine.
Ask AI about any Engine code
Questions strictly about engine codes (brand/model/engine type/production years).
| Castrol GTX 15W‑40 A3/B3 | |
|---|---|
| ACEA A3/B3 | ✔ |
| API SP (or SN) | ✔ |
| VW 501.01 / 505.00 | ✔ |
| MB‑Approval 229.1 | ✔ |
| Fiat 9.55535‑D2 | ✔ |
| Shell Helix HX5/6 15W‑40 | |
|---|---|
| ACEA A3/B3 | ✔ |
| API SN | ✔ |
| VW 501.01 / 505.00 | ✔ |
| MB‑Approval 229.1 | ✔ |
| Fiat 9.55535‑D2 | ✔ |
| Total Quartz 7000 15W‑40 | |
|---|---|
| ACEA A3/B3 | ✔ |
| API SP | ✔ |
| VW 501.01 / 505.00 | ✔ |
| MB‑Approval 229.1 | ✔ |
| Fiat 9.55535‑D2 | ✔ |
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 M20B25 engine
SAE 10W-40
API SJ
BMW Longlife-98
Most common problems, symptoms & fixes for the M20B25 engine.
Engine M20B25 is known for its durability but commonly faces issues like oil leaks from valve cover gaskets and rear main seals. Diagnosis involves checking for oil spots under the car and inspecting the gasket condition. Prevent leaks by regularly replacing aging gaskets and seals. Cooling system problems, such as radiator or water pump failure, can cause overheating; monitor coolant levels and replace components proactively. The timing chain tensioner may wear, leading to rattling noises—address this by timely tensioner and chain replacement. Regular oil changes with quality oil prevent sludge buildup, ensuring longevity. Addressing these issues early maintains engine reliability and performance.