Vehicles using SKYACTIV-G 2.5 engine list:
- MAZDA - CX-5 SKYACTIV-G 2.5 4WD (141kW) 2015–2017
- MAZDA - 6 SKYACTIV-G 2.5 AWD (141kW) 2017–2018
- MAZDA - 6 SKYACTIV-G 2.5 AWD (143kW) 2018–2022
Recommended oil for engine SKYACTIV-G 2.5 engine.
| Castrol MAGNATEC Hybrid 0W‑20 | |
|---|---|
| SAE 0W‑20 | ✔ |
| API SP | ✔ |
| ILSAC GF‑6 | ✔ |
| Mobil 1™ Advanced Fuel Economy 0W‑20 | |
|---|---|
| SAE 0W‑20 | ✔ |
| API SP | ✔ |
| ILSAC GF‑6 | ✔ |
| Liqui Moly Special Tec AA 0W‑20 | |
|---|---|
| SAE 0W‑20 | ✔ |
| API SP | ✔ |
| ILSAC GF‑6 | ✔ |
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 SKYACTIV-G 2.5 engine
SAE 0W-20
ACEA C5
API SN
ILSAC GF-5
Most common problems, symptoms & fixes for the SKYACTIV-G 2.5 engine.
Engine SKYACTIV-G 2.5
Symptoms:
- Rough idling or engine hesitation during acceleration
- Reduced fuel efficiency compared to expected performance
- Occasional knocking or pinging noises under load
- Check Engine Light (CEL) illumination related to misfires or emissions
- Oil consumption higher than normal
Diagnosis:
- Inspect spark plugs and ignition coils for wear or fouling, as these can cause misfires and rough running.
- Perform a fuel system check, including fuel injectors and fuel pressure, to ensure proper delivery.
- Use a diagnostic scanner to read any stored trouble codes, focusing on misfire codes (P0300-P0304) and knock sensor codes.
- Check for carbon buildup on intake valves, which is common in direct injection engines like SKYACTIV-G 2.5.
- Monitor oil levels and inspect for leaks or excessive consumption.
Fixes:
- Replace worn or fouled spark plugs and faulty ignition coils to restore smooth combustion.
- Clean or replace fuel injectors if clogged or malfunctioning.
- Perform intake valve cleaning using professional walnut blasting or chemical cleaning methods to remove carbon deposits.
- Address any vacuum leaks or intake system issues that may affect air-fuel mixture.
- Use high-quality synthetic oil and change it at recommended intervals to reduce oil consumption and engine wear.
- Update engine control software if Mazda has released any Technical Service Bulletins (TSBs) addressing engine performance or emissions.
Prevention:
- Follow Mazda’s recommended maintenance schedule strictly, including timely oil and filter changes.
- Use high-octane fuel as recommended to prevent knocking and optimize combustion.
- Avoid prolonged idling and aggressive driving to reduce carbon buildup.
- Periodically use fuel system cleaners approved for direct injection engines.
- Regularly inspect ignition components and replace them proactively before failure.
- Keep the engine software updated during service visits to benefit from any improvements.
By adhering to these diagnostic steps, fixes, and preventive measures, owners of Mazda CX-5 and Mazda 6 models equipped with the SKYACTIV-G 2.5 engine can maintain optimal performance and longevity.
Symptoms:
- Rough idling or engine hesitation during acceleration
- Reduced fuel efficiency compared to expected performance
- Occasional knocking or pinging noises under load
- Check Engine Light (CEL) illumination related to misfires or emissions
- Oil consumption higher than normal
Diagnosis:
- Inspect spark plugs and ignition coils for wear or fouling, as these can cause misfires and rough running.
- Perform a fuel system check, including fuel injectors and fuel pressure, to ensure proper delivery.
- Use a diagnostic scanner to read any stored trouble codes, focusing on misfire codes (P0300-P0304) and knock sensor codes.
- Check for carbon buildup on intake valves, which is common in direct injection engines like SKYACTIV-G 2.5.
- Monitor oil levels and inspect for leaks or excessive consumption.
Fixes:
- Replace worn or fouled spark plugs and faulty ignition coils to restore smooth combustion.
- Clean or replace fuel injectors if clogged or malfunctioning.
- Perform intake valve cleaning using professional walnut blasting or chemical cleaning methods to remove carbon deposits.
- Address any vacuum leaks or intake system issues that may affect air-fuel mixture.
- Use high-quality synthetic oil and change it at recommended intervals to reduce oil consumption and engine wear.
- Update engine control software if Mazda has released any Technical Service Bulletins (TSBs) addressing engine performance or emissions.
Prevention:
- Follow Mazda’s recommended maintenance schedule strictly, including timely oil and filter changes.
- Use high-octane fuel as recommended to prevent knocking and optimize combustion.
- Avoid prolonged idling and aggressive driving to reduce carbon buildup.
- Periodically use fuel system cleaners approved for direct injection engines.
- Regularly inspect ignition components and replace them proactively before failure.
- Keep the engine software updated during service visits to benefit from any improvements.
By adhering to these diagnostic steps, fixes, and preventive measures, owners of Mazda CX-5 and Mazda 6 models equipped with the SKYACTIV-G 2.5 engine can maintain optimal performance and longevity.