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Castrol Dot 4 Fully Synthetic Car Brake Fluid

Castrol Dot 4 Fully Synthetic Car Brake Fluid


Castrol Brake Fluid Dot 4 - 1 Litre

1 Litre


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  • Description
  • Benefits
  • Specifications
  • Technical Info
  • Shipping Explained

Castrol Dot 4 Fully Synthetic Car Brake Fluid

General Details:

SpecificationFMVSS 116 DOT 4
SpecificationISO 4925 Class 4
SpecificationJASO JIS K2233
SpecificationSAE J1703
SpecificationSAE J1704
for components see parts list

Addtional Images:

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Castrol Brake Fluid Dot 4 (Formerly Response Dot 4) Brake Fluid is a high performance, synthetic brake fluid which exceeds the requirements of the SAE J1703,SAE J1704, FMVSS 116 DOT 4 , ISO 4925 and Jis K 2233 specifications.  


Castrol Brake Fluid Dot 4 (Formerly Response Dot 4) Brake Fluid is formulated from mixed polyalkylene glycol ethers together with carefully selected additives. These enable the fluid to operate at a high performance level throughout its service life, offering system protection together with ultimate braking confidence.


It is strongly recommended that Castrol Brake Fluid Dot 4 (Formerly Response Dot 4) Brake Fluid, should be changed according to the vehicle manufacturers advice. In the absence of such advice, a 2 year change period is recommended.



PDF Downloads:

Download the Technical PDFDownload the Safety PDF


  • It’s a high boiling point brake fluid formulated from mixed polyalkylene glycol ethers and borate ester with other high performance additives and inhibitors.
  • Excellent performance in extremes of temperature.
  • Ultimate system protection against the effects of corrosion and high temperature vapour lock.

Castrol Brake Fluid Dot 4 (Formerly Response Dot 4) Brake Fluid is especially formulated to meet the demanding requirements of modern, high performance, automotive brake and clutch systems with the exception of those for which a mineral oil based fluid is specified (for example, some Citröen systems, for which Castrol Response LHM is suitable and Rolls Royce systems, for which Castrol HSMO Plus is approved).


  • Specifications
    • SAE J1703
    • SAE J1704
    • ISO 4925 (Class 4)
    • FMVSS 116 DOT 4
    • JIS K 2233

Technical Information:

Dry Boiling Point ºC 265

Wet Boiling Point ºC ca 170


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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We say...

"If a good cheap Dot4 brake fluid is what you are after then take a good look at this one."

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