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Castrol MAGNATEC Stop-Start 5W-30 C3 Fully Synthetic Engine Oil

Castrol MAGNATEC Stop-Start 5W-30 C3 Fully Synthetic Engine Oil


Castrol Magnatec 5W-30 C3 - 1 Litre

1 Litre


Castrol Magnatec 5W-30 C3 - 4 Litres

4 Litres


Castrol Magnatec 5W-30 C3 - 5 Litres

5 Litres


Castrol Magnatec 5W-30 C3 - 20 Litres

20 Litres


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  • Description
  • Benefits
  • Specifications
  • Shipping Explained

Castrol MAGNATEC Stop-Start 5W-30 C3 Fully Synthetic Engine Oil

General Details:

Content [litre]4
Packing TypeBottle
Oil Viscosity Classification SAE5W-30
SpecificationACEA C3
SpecificationAPI SN
OilSynthetic Oil
Manufacturer ApprovalMB Freigabe 226.5
Manufacturer ApprovalMB Freigabe 229.31
Manufacturer ApprovalMB Freigabe 229.51
Manufacturer ApprovalRenault RN0700
Manufacturer ApprovalRenault RN0710
Manufacturer ApprovalBMW Longlife-04
Manufacturer ApprovalFiat 9.55535-S3

Castrol MAGNATEC Stop-Start 5W-30 C3 is a fully synthetic engine oil designed to protect against engine wear, specifically from the stresses of stop-start driving in congested environments. Formulated using Castrol’s innovative DUALOCK technology and the most efficient base oils, MAGNATEC Stop-Start 5W-30 C3 can reduce engine wear by 50% and improve fuel economy, making it the perfect engine oil choice for city drivers.

The DUALOCK molecules contained in Castrol’s MAGNATEC oils cling to critical engine parts and form a powerful protective layer that is effective from engine start up. Up to 75% of potential engine wear risk comes in the warm-up stage, so having non-stop protection that’s effective immediately is one of the best ways to improve the long-term health of your engine. Castrol MAGNATEC Stop-Start 5W-30 C3 offers the ultimate protection for driving in congestion, boosts fuel economy, and works perfectly in vehicles with even the latest stop-start engine technology.

PDF Downloads:

Download the Technical PDFDownload the Safety PDF


  • DUALOCK molecules that cling to engine parts and create a protective layer
  • Non-stop engine protection that’s effective during the critical engine warm-up stage
  • Offers superior start up performance even under extreme cold conditions
  • Perfect for stop-start driving in congested environments like cities
  • Reduces engine wear by up to 50%, extending peak engine performance
  • Boosts fuel economy by improving engine efficiency


Castrol MAGNATEC Stop-Start 5W-30 C3 meets the following specifications and approvals:

  • ACEA C3
  • API SN
  • BMW Longlife-04
  • Meets Fiat 9.55535-S3
  • MB-Approval 226.5/229.31/229.51
  • Renault RN 0700/RN 0710


SHIPPING IS FREE* for orders of £75 and over , regardless of the weight of your order.
We've tried to keep all other shipping costs as low as we can.

Carriage starts at just £0.95 (inc VAT) for small items, with our most common courier rate set at £5.99 for orders of 5kg (enough for 5 litres of oil).

  • *Free shipping is available for UK Royal Mail, UPS Access Point™ (click & collect) and standard UK courier services (not express / priority / islands).
  • Courier surcharges mean we are unable to offer free "to the door" courier shipping from us in Cornwall up to Highlands / Grampian in Scotland - and because we send a lot of liquids, not every courier option is available to us. UPS Access Point™ (click & collect) is available as a free shipping option across Scotland, Wales and England, wherever there is a UPS Access Point™ Location.
  • Carriage charges are based on weight - please see our table of carriage costs for full details (although adding an item to your cart and viewing the calculated carriage is often easier!).
  • Priority shipping is also available.

How long will it take to get my order?

We give an estimate of delivery dates as you shop and in your basket. The vast majority of items are held in stock and dispatched from our UK warehouse and we'll do all we can to get your order to you as quickly as possible.

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Brand: Castrol
Oil Type: Fully Synthetic
DPF Compatible: Yes

DPF Compatible

This Engine Oil is DPF (diesel particulate filter) Compatible.

What’s a DPF?