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Castrol Edge Engine Oil 5W40 - 4L
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Castrol Edge Engine Oil 5W40 - 4L

Price: £38.00

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    Product Details


    Castrol EDGE 5W-40 gives you the confidence to demand maximum engine performance from today's higher revving, higher output engines that operate under increased pressures requiring lower viscosity oils with higher level of protection.


    • Helps to sustain improved performance for longer, even when under pressure
    • Helps to maximise short and long term engine performance
    • Delivers excellent levels of protection across a variety of driving conditions and temperatures
    • Reduces engine deposits to help maximise engine response

    Meets or exceeds industry specifications SaE 5W-40,aCEa a3/B3,a3/B4, C3,aPI SN/CF,VW 502 00/ 505 00,BMW Longlife-04,MB-approval 229.3kg1/ 229.51,Porsche a40,Renault RN0700/ RN0710,Meets Fiat 9.55535-S2,Dexos2*

    *Suitable for engines requiring GM dexos2 engine oil performance; this product may also be used where GM LL-a-025 or LL-B-025 products were originally specified.


    From the Manufacturer|Powered by Answers™

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    Castrol EDGE recommended by car manufacturers

    We can help you find the right oil for your car

    • Castrol EDGE gives you the confidence to demand maximum performance from today’s modern engines, which require higher levels of protection and improved deposit control.

      It’s easy to give your engine the benefit of our strongest, most advanced performance oil yet.


      • Castrol EDGE is up to 40% stronger1 at reducing metal to metal contact when under the engine’s most severe pressure
      • Independent tests also proved that Castrol EDGE is stronger for up to 35% longer2.
      • All our oils give you the confidence to demand enhanced performance from your engine
    • The Maximum Endurance Test

      Every drive is a test of your oil’s strength so it must have the capacity to respond again and again to a wide range of driving styles and situations.

      That’s why Castrol EDGE has been assessed in the most punishing industry test there is.

      In our Maximum Endurance Test an engine is run at full speed indefinitely until the oil is compromised and the engine fails. In the test we used 13,650 litres of fuel, 4 sets of tyres, but only 1 litre of oil3.
      Castrol EDGE maintained its strength up to 35% longer2 than a leading competitor; demonstrating enhanced performance under the very toughest conditions.

      By pushing engines to the point of destruction we’re able to show conclusively that however you drive, Castrol EDGE will have more than enough strength to adapt and respond.

    How to Top up your oil

    Maximum Endurance Test

    Castrol EDGE in Motorsport

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    Useful information

    Viscocity is a measurement of the oil's thickness. Take 5W-30 for example, the “5W” is the Winter rating and tells us how thin the oil is when cold, smaller numbers here mean better circulation on start up from cold. The second number, “30” relates to how thick the oil is when the engine is at working temperature, the bigger the number, the thicker the oil film is between all the moving surfaces. However, thicker oil can lead to less fuel efficiency so a balance between protection and efficiency must be met. Some cars need a specific viscosity, some cars can use different viscosities.

    It’s important to find out which viscosity your car needs so that the engine is protected properly. You can do this by checking your vehicle handbook or by texting “OIL” and your vehicle reg to 60777*.
    Types of Oil
    Modern oils are made up of a blend of base oils and additives. The “base oils” can be Mineral, Part or Fully Synthetic. Many modern vehicles have performance requirements which need the better quality Fully Synthetic oils. Part Synthetic oils are a blend of mineral and Fully Synthetic oils. These offer some of the performance benefits, but at a cheaper price than Fully Synthetic oils. Some older cars can use Part Synthetic oils, but Fully Synthetic oils offer better performance and protection all round.
    Not all oils are the same
    Some oils only meet a certain performance level. Castrol oils are formulated in partnership with major car manufacturers to exceed the performance levels and provide extra protection.

    With over 100 years of formulating oils you can be sure Castrol oils are going to give your engine the protection and performance it deserves.


    ACEA C3
    BMW Longlife-04
    Meets Fiat 9.55535-S2
    MB-Approval 229.31/ 229.51
    Porsche A40
    Renault RN 0700 / RN 0710
    VW 502 00/ 505 00


    1 In a test of the oil’s strength across a variety of engine speeds, the Castrol EDGE range average metal to metal contact is 40% lower than a leading competitor.

    2 We asked a third party laboratory to test the Castrol EDGE range using our Maximum Endurance Test and on this test Castrol EDGE was proven to be on average 35% stronger for longer compared to a competitor brand from another major lubricant supplier.

    3 Representative amount of fuel, tyres and oil used in our MET test, may vary

    Full Specification

    Size 4L
    Colour Gold
    Dimensions 256 x 260 x 117mm
    Material Plastic
    Product Type Engine Oil
    Type Engine Oils
    Weight 3.6kg
    Brand Castrol
    Rated 5 out of 5 by 7 reviewers.
    Rated 5 out of 5 by Best of both worlds My engine's getting on a bit - 120K, so I thought I'd go a little thicker from 5W30 to 10W40 - but the loss of viscosity at startup meant it ran noisier for the first minute or two ... and I didn't like to think what that meant for my engine. So I bought this 5W40 - which is thick when hot and thin when cold. Plus it's Castrol's highest quality engine oil. So at this price, what's not to like ? 04 August 2013
    Rated 5 out of 5 by Excellent Product and service Seen oil cheapest on Asda Direct and ordered it straight away, Excellent service from asda, quick and easy, also the oils in my car and running smoothly, cheers Asda 10 October 2011
    Rated 5 out of 5 Best Price Around Asda Direct was by far the cheapest place for this quality fully synthetic oil. Will be recommending and buying from them again. 22 April 2012
    Rated 5 out of 5 by value for money fiat spec oil for new cars cheaper than dealer prices good value 12 August 2012
    Rated 5 out of 5 by Castrol Oil Very oily product with very smooth consistency and good for my Polo engine (I am told)! 05 April 2012
    Rated 5 out of 5 by Great high performance oil I always use this oil for my 1.8T Audi S3, high quality, high performance oil. Great service from Asda click and collect 05 September 2014
    Rated 5 out of 5 by Car Servicing Best value on the net 27 April 2012
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