Search Button


Account Button


Basket Button

Basket Basket

Search Suggestions



View All Results

Performance Engine Oils
Castrol GTX 15W-40 A3/B3 Car Engine Oil

Castrol GTX 15W-40 A3/B3 Car Engine Oil


Castrol GTX 15w-40 A3/B3 - 1 Litre

1 Litre


Castrol GTX 15w-40 A3/B3 - 4 Litres

4 Litres


Castrol GTX 15w-40 A3/B3 - 5 Litres

5 Litres


Checking Stock



Add To Basket

  • Description
  • Benefits
  • Specifications
  • Shipping Explained

Castrol GTX 15W-40 A3/B3 Car Engine Oil

General Details:

OilMineral Oil
Packing TypeBottle
Oil Viscosity Classification SAE15W-40
Content [litre]4
Manufacturer ApprovalMB 229.1
Manufacturer ApprovalVW 501 01 / 505 00
Manufacturer ApprovalFIAT 9.55535-D2
SpecificationACEA Light Duty A3/B
SpecificationAPI Gasoline SN

Additional Images:

Click for larger picture
Castrol GTX is one of the world's most trusted motor oils. It's more than just oil, it's liquid engineering that protects against problems, like sludge, that your engine faces every day.

Severe driving conditions such as every day stop-and-go/stop-start traffic, harsh weather conditions and extended drain intervals, can all cause the build-up of a thick, tar-like substance called sludge. You can't see this sludge build-up but it can damage your engine's performance and cause premature engine failure. Protect your car from harmful sludge build-up with Castrol GTX.

GTX 15W-40 A3/B3 is a high-quality engine oil featuring anti-sludge properties. Castrol GTX's Double Action technology frees the engine from old deposits while providing better protection from black sludge.

PDF Downloads:

Download the Technical PDFDownload the Safety PDF


  • Contains anti-sludge formula that provides better sludge protection compared to tough industry standards
  • Superior protection against viscosity and thermal breakdown
  • Anti-wear additives to extend the life of your engine
  • High lubrication safety and good wear protection thanks to carefully assembled additive package
  • Keeps the engine clean and provides reliability for many kilometres
  • Catalyst-gentle due to low phosphor content
  • Good high-temperature stability, i.e. even at high temperatures, the lubricating film remains resilient and pressure-stable


  • ACEA A3/B3
  • API SN
  • MB-Approval 229.1 (Mercedes Benz)
  • VW 505 00 (VW / Seat / Skoda / Audi)
  • VW 501 01 (VW / Seat / Skoda / Audi)
  • Meets Fiat 9.55535-D2


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.

Share this product:

Find Oils & Parts

Use Our Product Lookup
Brand: Castrol
Oil Type: Synthetic Technology