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Castrol GTX Engine Oil 10W40 - 4L
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Castrol GTX Engine Oil 10W40 - 4L Reviews

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     Protect your car from harmful sludge with Castrol GTX 10W-40 a3/B4, which contains anti-sludge formula that provides 25a better sludge protection compared to tough industry standards.*

    Liquid Engineering protects against problems that your engine faces every day.

    * Vs aPI SL /or aCEa a3/B4 Industry standards

    approvals  Specifications

    • aCEa a3/B4
    • aPI SL/CF
    • MB-approval 229.1
    • VW 501 01


    From the Manufacturer|Powered by Answers™

    Thank You Is the information in this section helpful? Yes / No

    We can help you find the right oil for your car

    • Castrol GTX Protects your engine against Sludge build up and provides a balanced performance under all types of conditions. It is specially engineered to prevent the harmful build-up of engine sludge, reducing oil deposits and providing everyday protection for your engine.

      Castrol GTX provides 25% better protection against sludge than the latest industry standard.*

    How to Top up your oil

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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 A3/B3, A3/B4
    Meets Fiat 9.55535-D2
    MB-Approval 229.1
    VW 501 01/ 505 00


    * vs. API SL &/or ACEA A3/B4 Industry standards

    Full Specification

    Size 4L
    Colour White
    Dimensions 256 x 260 x 117mm
    Material Plastic
    Product Type Engine Oil
    Type Engine Oils
    Weight 3.6kg
    Brand Castrol
    Rated 4.9 out of 5 by 52 reviewers.
    Rated 4 out of 5 by Well Oiled Good Price for a Good Product. All parts of transaction ran smoothly. Pickup in store could have been better, but think this was a "Store specific" thing. 04/12/2011
    Rated 5 out of 5 by Bargain Oil I usually have to get cheap supermarket oil which costs £7.99 for 1L. This was on offer at £10.00 for 4L and is a top branded product. Great bargain. 18/01/2012
    Rated 5 out of 5 by Worth every litre Castrol GTX is a leading product on its category and I always use it in my car. It gives me the result I expect and the peace of mind while I drive.. 23/10/2011
    Rated 5 out of 5 by Excellent value Purchased this product from asda direct and chose to collect from store. It was ready for collection in a couple of days. Happy with my purchase. 29/12/2011
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