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| Standard Delivery | £49.99 | 7 to 10 working days |
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| Standard Delivery | £75.00 | 7 to 10 working days |
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Product Number: 15C5B5
Castrol Magnatec Stop-Start 5W-30 S1 is a passenger car and light commercial vehicle engine oil designed for petrol and diesel vehicles that experience frequent stop-start operation, suited specifically to Fiat vehicles requiring a 5W-30 lubricant that meets the Fiat 9.55535-S1 specification. It is suitable for use in automotive gasoline and diesel engines where the manufacturer recommends an ACEA C2 or API SN 5W-30 lubricant.
The oil is formulated with Castrol's 'intelligent molecules' chemistry, designed to cling to engine parts when the oil drains down between starts and form a self-healing layer that protects at each of the critical stages of stop-start driving. Castrol cites the industry OM646LA test as showing significantly less wear in stop-start operation versus comparable lubricants.
Approvals and performance levels include ACEA C2; API SN; and Fiat 9.55535-S1.
The 20-litre pack format is suited to single-machine top-up and small workshop service. Store sealed in the original packaging, in a clean, dry area away from extremes of temperature, to preserve product performance over its shelf life.
With viscosity index 159 and pour point -46°C, Castrol - Magnatec Stop-Start 5W-30 S1 Engine Oil - 20 Litre supports stable lubrication across the operating temperature range and cold-start conditions.
Today even a normal driver can stop and start as many as 18,000 times a year. And all that idling in traffic or waiting at junctions causes microscopic wear in your engine. In the latest industry test, New Castrol MAGNATEC STOP-START 5W-30 S1 gives significantly less wear in STOP-START operation*.
New Castrol MAGNATEC STOP-START 5W-30 S1 has intelligent molecules that cling, and form a self-healing layer so it’s always ready to protect at each of the critical stages of stop-start driving. Castrol MAGNATEC STOP-START 5W-30 S1. Instant Protection From The Moment You Start. Every Time You Start.
*As tested in the industry OM646LA test*
Specifications, Approvals & Recommendations:PartsForMachines is a premier e-commerce platform, founded in 2019 in Warwickshire, UK, specializing in aftermarket parts and services for construction, agriculture, and industrial machinery. We offer an extensive catalog of over 500,000 products. Standard delivery: 1–3 working days within UK mainland. We are proud to be an authorised distributor, giving customers extra confidence when purchasing genuine products from us. In addition, we provide a 30-day return policy for eligible items.
| Density @ 15C, Relative | 0.850 g/ml |
|---|---|
| Viscosity, Kinematic 100C | 10.3 mm²/s |
| Viscosity, CCS -30C | 5500 mPa.s (cP) |
| Blend Flash PMCC | 209 °C |
| Viscosity, Kinematic 40C | 60 mm²/s |
| Viscosity Index | 159 |
| Ash, Sulphated | 0.7 % wt |
| Pour Point | -46 °C |
| Engine Parts | Product Number | Product Name | Recommended Units | Product Price |
|---|
castrol-magnatec-st-st-5w-30-s1-20l.pdf
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Standard Delivery: UK Mainland Free
Delivery Estimate: 3 to 5 working days
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| Technical Specification | ||||
|---|---|---|---|---|
| PRODUCT NUMBER | PRD00004462 | PRD00004155 | PRD00004618 | PRD00004463 |
| Density, 15°C | 0.845 | 0.867 | 0.881 | 0.845 |
| Flash Point (COC) | 239 | 240 | 230 | 239 |
| Kinematic Viscosity @40°C | 75 | 90 | 109 | 75 |
| Pour Point | -48 | -42 | -36 | -48 |
| SAE | 5W-30 | 10W-40 | 15W-40 | 5W-30 |
| Volume | 20 | 20 | 20 | 209 |
| Viscosity Index | 159 | 153 | 139 | 159 |
| Oil Type | Full Synthetic | Full Synthetic | Mineral | Full Synthetic |
| Show More | ||||
A. Castrol Magnatec Stop-Start 5W-30 S1 is suitable for use in automotive gasoline and diesel engines where the manufacturer recommends an ACEA C2 or API SN 5W-30 lubricant, particularly Fiat vehicles requiring a 5W-30 to Fiat 9.55535-S1.
A. Yes, Castrol Magnatec Stop-Start 5W-30 S1 meets the Fiat 9.55535-S1 specification and is the appropriate Castrol Magnatec Stop-Start variant for Fiat vehicles requiring a 5W-30 to that standard.
A. API and ACEA are the universal lubricant performance standards every reputable oil meets. They are your baseline check — match the code your handbook specifies (e.g., API CI-4 or ACEA E7 for heavy-duty diesel) and the oil is technically suitable for your machine. Every oil on our site lists its API and ACEA classifications.
A. Castrol Magnatec Stop-Start 5W-30 S1 meets ACEA C2 and API SN.
A. Yes, Castrol Magnatec Stop-Start 5W-30 S1 is specifically formulated for vehicles that experience frequent stop-start operation.
A. Both meet ACEA C2 and are suitable for stop-start operation. S1 carries the Fiat 9.55535-S1 specification, intended for Fiat vehicles requiring that approval. C2 carries the PSA B71 2290 specification, intended for Peugeot and Citroen vehicles. Both meet ACEA C2 and API SN — choose by the specific manufacturer specification on your vehicle.
A. An OEM Specification is the lubricant requirement set by a vehicle or equipment manufacturer (e.g., MB 228.3, VW 504.00). When an oil lists the code, the oil manufacturer has developed and tested it to meet the criteria the equipment manufacturer requires. Match the code in your handbook and you have a lubricant engineered for your machine.
A. An OEM Approval means the oil has been formally tested and signed off by the equipment manufacturer and listed on their official approved-products register (e.g., MB-Approval 228.3). An Approval confirms the oil is recognised by the equipment manufacturer for service use in their machines.
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