Vehicles using R9DB engine list:
Recommended oil for engine R9DB engine.
Ask AI about any Engine code
Questions strictly about engine codes (brand/model/engine type/production years).
| Castrol EDGE 5W-30 C3 | |
|---|---|
| ACEA C3 | ✔ |
| API SN/CF | ✔ |
| VW 505.00 / 505.01 | ✔ |
| MB 229.31 / 229.51 | ✔ |
| Dexos2 | ✔ |
| Mobil 1 ESP Formula 5W‑30 | |
|---|---|
| ACEA C3 | ✔ |
| API SN/CF | ✔ |
| VW 505.00 / 505.01 | ✔ |
| MB 229.31 / 229.51 | ✔ |
| GM dexos2 | ✔ |
| Liqui Moly Top Tec 4600 5W‑30 | |
|---|---|
| ACEA C3 | ✔ |
| API SN/CF | ✔ |
| VW 505.00 / 505.01 | ✔ |
| MB 229.31 / 229.51 | ✔ |
| GM dexos2 | ✔ |
| Sunoco Ultra Full Synthetic Euro 5W‑30 | |
|---|---|
| ACEA C3 | ✔ |
| API SN/CF | ✔ |
| VW 505.00 / 505.01 | ✔ |
| MB 229.31 / 229.51 | ✔ |
| GM dexos2 | ✔ |
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 R9DB engine
SAE 5W-30
ACEA C3
API SN
VW 504.00
VW 507.00
Most common problems, symptoms & fixes for the R9DB engine.
Engine R9DB in the Ford Focus 2.0 ST EcoBoost (2014–2018) commonly faces issues like carbon buildup on intake valves, turbocharger wear, and coolant leaks. Diagnosis involves checking for rough idling, loss of power, or coolant level drops. Use a borescope to inspect intake valves and perform a smoke test for leaks. Prevention includes regular use of high-quality fuel, timely oil changes with synthetic oil, and periodic intake cleaning. Solutions involve walnut blasting to remove carbon deposits, turbocharger inspection or replacement if worn, and repairing coolant leaks promptly to avoid overheating. Maintaining the cooling system and using OEM parts ensures engine longevity.