CarPlan Demon Cool DCO101 Antifreeze and Coolant, 1 Litre

Litre: CarPlan Demon Cool DCO101 is a ready-to-use antifreeze and coolant presented as a top-up for petrol and diesel vehicles. The listing claims it mixes with antifreeze of any colour and provides freeze protection to -36ºC, but buyers should confirm the vehicle manufacturer's coolant requirements before use.

At a glance

Listed as pre-mixed with de-ionised water, with claimed winter protection down to -36ºC.
The manufacturer describes it as a top-up coolant for petrol and diesel vehicles that mixes with all colours of antifreeze.
The listing claims corrosion protection for up to 5 years and cites BS6580 (2010) and ASTM D3306.

Price

£5.40Save 32%

Reference price: ~~£7.99~~

Price checked: 12 Nov 2026

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Pros and cons

Pros

Ready-to-use pre-mixed formula avoids having to dilute it before topping up.
One litre is a handy size for a top-up rather than a large workshop refill.
Customer feedback describes it as good quality and effective for its intended purpose.

Technical specifications

12 specifications

Identity
Brand	CarPlan
Model	DCO101
Item form	Liquid
Scent	Unscented
Size	1 l (Pack of 1)
Item volume	34 Fluid Ounces
Number of items	1

Use and claimed properties
Recommended uses	Protecting engine from freezing, maintaining optimal engine temperature, and preventing rust and corrosion for all types of internal combustion engines
Material feature	Eco-Friendly
Contains liquid contents	Yes

Dimensions and weight
Dimensions listed	10.5 x 6.5 x 22.5 cm; 1.15 kg
Weight listed	1.15 Kilograms

What to know before buying

The listing presents this as a universal top-up, but coolant suitability can depend on the vehicle. Check the vehicle handbook or existing coolant specification before mixing or topping up. The protection temperature, standards and up-to-5-year corrosion claim are manufacturer statements, not independently verified here.

What’s in the box

Included

CarPlan DCO101 Demon Cool antifreeze and coolant, 1 litre

Who is it for?

A good fit for

Drivers looking for a pre-mixed coolant in a one-litre container for a compatible top-up.
Petrol or diesel vehicle owners whose handbook permits this coolant specification.

Less suited to

Anyone needing a larger quantity for a full cooling-system refill.
Buyers unable to confirm that the product meets their vehicle's coolant requirements.

CarPlan Demon Cool DCO101 Antifreeze and Coolant, 1 Litre · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.6 / 5 · 746 ratings

5 stars74%74%
4 stars16%16%
3 stars7%7%
2 stars1%1%
1 star2%2%

Customer feedback describes the antifreeze as good quality and effective, with some feedback identifying it as suitable for topping up and considering it good value. The overall rating distribution is mostly positive but includes some lower ratings, so experiences are not uniform. These opinions do not establish vehicle compatibility. Confirm the coolant specification for your car before relying on the product's universal-use claims.

Positive themes

Customers describe the product as good quality and effective for its intended function.
Feedback includes a positive view of its usefulness for topping up and its value for money.

Frequently asked questions

Does CarPlan Demon Cool need dilution?

The listing says it comes pre-mixed with de-ionised water, so it is presented as ready to use.

What freeze protection does the listing claim?

It claims winter protection down to -36ºC. This is a manufacturer statement.

Can it be mixed with antifreeze of another colour?

The listing claims compatibility with all colours, but colour alone does not establish coolant compatibility. Check your vehicle handbook or coolant specification before mixing.

How much is in the container?

The title and size identify a one-litre pack. The details also list 1000.0 millilitre and 34 Fluid Ounces, so the volume wording is not fully consistent.