Castrol MAGNATEC Professional / MAGNATEC 5W-40 Full-Synthetic / Premium Engine Oil (API SN / ACEA A3/B4 / A3/B3) Product Description Castrol MAGNATEC …
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Full-Synthetic / Premium Engine Oil (API SN / ACEA A3/B4 / A3/B3)
Castrol MAGNATEC 5W-40 is a high-performance engine oil formulated with “Intelligent Molecules” that cling to critical engine parts. This means when the engine is turned off and oil drains down, these molecules remain to protect metal surfaces during engine start-up, significantly reducing the wear associated with warm-ups. It is a full synthetic, multigrade oil engineered for modern petrol and diesel (non-DPF) engines, multivalve high-speed engines, and those requiring ACEA A3/B4 or A3/B3 and API SN/CF performance.
Petrol and diesel engines (excluding diesel engines fitted with Diesel Particulate Filters unless specified) where ACEA A3/B4 or API SN/CF oils are recommended.
High-speed, multivalve engines.
All driving conditions: cold starts, stop/start urban driving, highway, and mixed driving
| Specification / Standard | Meets / Complies |
|---|---|
| API | SN / CF |
| ACEA | A3/B4, A3/B3 |
| OEM / Additional References | Fiat 9.55535-S2; (others may apply depending on region) |
| Property | Test Method | Value |
|---|---|---|
| Density @ 15 °C | ASTM D4052 | ~ 0.85 g/mL |
| Kinematic Viscosity @ 40 °C | ASTM D445 | ~ 82–89 mm²/s |
| Kinematic Viscosity @ 100 °C | ASTM D445 | ~ 13.9-14.5 mm²/s |
| Viscosity Index | ASTM D2270 | ~ 169-174 |
| Cold Cranking / CCS at -30 °C (5W) | ASTM D5293 | ~ 5,500-5,800 mPa·s (cP) |
| Pour Point | ASTM D97 | ~ -36 to -48 °C |
| Flash Point (PMCC) | ASTM D93 | ~ 202-210 °C |
| Sulphated Ash (Ash, Sulphated) | ASTM D874 | ~ 0.8-0.83 % wt |
Reduced wear during warm-ups and start-up – the “Intelligent Molecules” cling to engine metal surfaces even when oil drains, protecting critical parts from start-stop wear.
Full synthetic formulation – offers better thermal stability, oxidation resistance, and performance across a broad temperature range.
Excellent cold start performance – fluidity and viscosity at low temperatures ensure quicker lubrication upon start in cold conditions.
Proper high temperature protection – maintains film strength, reduces oil degradation in demanding/high load/high temp conditions.
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