image of Castrol Magnatec 10W40 A3 B4 Oil 4 Litre

Item: 918615

Castrol Magnatec 10W40 A3 B4 Oil 4 Litre


(Unit price: £7.50 per litre)

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Halfords Oil free oil level check free oil top up engine oil
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  • Castrol Magnatec 10W40 A3 B4 Oil

    The Castrol Magnatec 10W40 A3 B4 Oil clings to the engines surface like a magnet providing constant protection even when the engine is switched off, providing critical engine protection during start and warm-up periods.

    Every time you start your car it takes most oils 10 minutes to work effectively, because the oil cannot protect properly until it reaches a critical temperature. Castrol GTX Magnatec 10W40 is different as it gets to work straight away by virtue of a unique synthetic ester that clings to the engine like a magnet.

    Castrol Magnatec 10W40 A3 B4 Oil Extra Info

    • SAE 10W40
    • ACEA A3 B4
    • API SL
    • Meets the requirements of VW 505.00
    • 4 litre bottle

    Additional Information

    Please refer to your vehicle handbook to confirm the suitability of this oil for your vehicle

  • Rated 4.8 out of 5 by 70 reviewers.
    Rated 5 out of 5 by Excellent I am using this type of oil since i bough the car, it seems to be the best and very recommended by many people. 13 July 2016
    Rated 5 out of 5 by Great product that perform wonders on car engine. This engine oil was introduced by a friend and I bought to check what he was talking about with hope that was an exaggeration, but with a surprise my car engine and performance was cool and great. GREAT VALUE, GREAT PERFORMANCE........ 06 May 2016
    Rated 5 out of 5 by Great service Felt the difference in the performance of the car definitely will be using this all the time. 29 March 2016
    Rated 5 out of 5 by Oil Great item, highly recommed for Your car great value as qell 27 January 2016
    Rated 5 out of 5 by Great oil Great oil always use it and got 10% off as well so spot on Halfords. 15 October 2015
    Rated 4 out of 5 by Be careful when opening There's a metal foil which needs to be punctured/removed. Be careful when you do this that you don't tear it and have it end up in your engine. The quality of the oil: who knows? I went with a brand I knew. Fingers crossed! 15 July 2015
    Rated 5 out of 5 by Lovely product I've used standard oils in the past and they "do the job" this oil seems to do that job and more, the ticking from my old car has gone now ever since I've used this oil, and it runs like a dream, even for a 15 year old car! 22 August 2014
    Rated 4 out of 5 by Mr I have used this brand and oil in my car some the last few years and found that due to my cars age this oil does help avoid engine problems due to wear and tear. 03 June 2013
    • 2016-09-28 T13:16:57.241-05:00
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    • Standard Delivery

      FREE within 4 working days on all orders over £30 (Halfords products only)

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    • Morning Delivery

      Order by 8pm for delivery 8am - 12 midday (Mon - Fri)

    • Afternoon Delivery

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      12 midday - 6pm (Mon - Fri)

    • Evening Delivery

      Order by 8pm for delivery 6pm - 9pm (Mon - Fri)

  • You can buy this product from one of our carefully selected Approved Partners. The full list of options available are below. Simply add your chosen option to your basket and proceed to checkout when you're ready.

    You can purchase products supplied by Halfords and selected other suppliers on

    Checkout is always via and all payment will be taken via In checkout the products will be split into separate deliveries for each supplier.

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    Price Seller Info Purchase

Some of the parts we sell here at Halfords have been reconditioned. These will carry a Refundable Deposit or an extra surcharge amount. When you add one of these reconditioned items to your basket, we'll add this extra cost automatically.

Once you've sent us your old item we'll check it over, and then refund you the full surcharge as long as everything is ok.

Before you return your old unit please make sure it's in re-serviceable condition. So if you're returning caliper casings, you'll need to double check they aren't badly damaged or broken. If the part you've sent is found to be unserviceable, we reserve the right not to refund the surcharge.

Please note that if you're returning your old unit to our National Returns Centre then this will be at your own expense.

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Castrol Engine Oil

Castrol Magnatec 10W40 A3 B4 Oil 4 Litre

£29.99 Castrol Magnatec 10W40 A3 B4 Oil offers 4 X more wear protection than ordinary oils from start up.