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Castrol MAGNATEC 10W-40 A3/B4 Car Engine Oil

Castrol MAGNATEC 10W-40 A3/B4 Car Engine Oil


Castrol Magnatec 10w-40 - 1 Litre

1 Litre


Castrol Magnatec 10w-40 - 4 Litres

4 Litres


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  • Description
  • Benefits
  • Specifications
  • Shipping Explained

Castrol MAGNATEC 10W-40 A3/B4 Car Engine Oil

General Details:

OilPart Synthetic Oil
Oil Viscosity Classification SAE10W-40
Packing TypeBottle
Content [litre]4
Manufacturer ApprovalFIAT 9.55535-D2
Manufacturer ApprovalMB 226.5
Manufacturer ApprovalRenault RN 0700
Manufacturer ApprovalRenault RN 0710
Manufacturer ApprovalVW 501 01 / 505 00
SpecificationACEA Light Duty A3/B
SpecificationAPI Gasoline SN

Addtional Images:

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Traffic congestion has increased dramatically; today even a normal driver can stop and start up to 18,000 times a year*. That’s annoying, but worse, it slowly damages your engine – permanently.
Uniquely, Castrol’s breakthrough MAGNATEC DUALOCK molecules cling to critical engine parts and lock together to:

  • Form a powerful force field of protection 
  • Dramatically reduce both warm-up** and stop-start wear by 50%*** 
  • Offer non-stop protection from every start.
Castrol Magnatec 10W-40 A3/B4 is from the updated Castrol Magnatec range car oil, equally suitable for petrol and diesel engines and replacing the separate Magnatec 10W-40 A3/B3 and Magnatec Diesel B3 engine oils.

* Global average from 50 cities, Castrol MAGNATEC STOP-START Index 2014
** Tested vs the API SN wear limit in the Sequence IVA test.
*** Tested versus the ACEA wear limit in the OM646LA test.

PDF Downloads:

Download the Technical PDFDownload the Safety PDF


  • Exceeds the requirements of the ACEA A3 and B4 specifications
  • Provides protection for all driving styles and in all conditions
Castrol Magnatec’s DUALOCK Molecules;

  • Form a powerful force field of protection 
  • Dramatically reduce both warm-up and stop-start wear 
  • Offer non-stop protection from every start


  • ACEA A3/B3, A3/B4
  • API SN
  • Meets FIAT 9.55535-D2
  • MB-Approval 226.5
  • Renault RN 0700/0710
  • VW 501 01 / 505 00


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: Synthetic Technology

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""Non-stop protection from every start""

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