STC50529 | Td5 & Land Rover OAT Coolant Concentrate – Ravenol C12+
Ravenol C12+ OAT coolant concentrate for Land Rover vehicles requiring STC50529 coolant, including Defender Td5, Discovery 2 Td5 and other Land Rover models using OAT coolant. Supplied as a 5L concentrate, it is normally mixed 1:1 with distilled water for most Td5 and Land Rover cooling system work.
- For Land Rover applications requiring OAT / STC50529 coolant
- Suitable for Td5 vehicles and later Land Rover models using OAT coolant
- 5L concentrate; makes approximately 10L coolant when mixed 1:1
- Ravenol C12+ organic additive technology coolant
- Use with distilled water and flush the system if changing coolant type
£31.32 inc. UK VAT
In stock - ready for immediate dispatchPhysically in stock at our workshop for immediate dispatch or collection.
Genuine, OEM & trusted aftermarket parts for vehicles we know and support.
Free mainland UK shipping £99+ · Upgraded delivery options at checkout
Please fill in the fields below with the shipping destination details in order to calculate the shipping cost.
Ravenol OAT coolant for Td5 and later Land Rover cooling systems
Ravenol OTC C12+ is a concentrated OAT coolant for Land Rover vehicles that specify STC50529 coolant. It is the correct coolant type for Td5 cooling system service work and other Land Rover applications that require long-life organic additive technology coolant.
Use this coolant when refilling the system after radiator, water pump, thermostat, hose or general cooling system work. It is also suitable for a full coolant change where the existing coolant is old, contaminated or of unknown type.
This is concentrate, not ready-mixed coolant. For most Td5 and Land Rover use, mix 1:1 with distilled water to make approximately 10 litres of mixed coolant from this 5 litre container. Before filling, flush the system, check for leaks and avoid mixing different coolant types unless the system has been properly cleaned out first.
For related parts, see our Td5 engine cooling parts or browse the wider Land Rover antifreeze and coolant range.
Mixing ratios
| Antifreeze protection to approx. | Parts antifreeze | Parts water |
|---|---|---|
| -12°C | 1 | 3 |
| -20°C | 1 | 2 |
| -37°C | 1 | 1 |
For Td5 vehicles and most Land Rovers, use the standard 50% mix: 1 part coolant concentrate to 1 part distilled water.
Ravenol specifications and recommendation list
Ravenol OTC C12+ is a monoethylene glycol based OAT coolant concentrate. It is silicate, borate, nitrite, amine and phosphate-free, and is formulated for corrosion, frost and overheating protection in modern cooling systems, including aluminium engines.
- Land Rover reference: STC50529
- Jaguar Land Rover reference: STJLR.651.5003
- Coolant type: OAT / C12+ concentrate
- Colour: lilac
- Freezing point at 50% solution: -37°C
- Boiling point: 187°C
- pH at 20°C, 50% solution: 7.5–8.5
- Density at 20°C: 1130 kg/m³
Ravenol OTC OAT coolant benefits
- Excellent for aluminium alloy engines
- Good reserve alkalinity
- Premium corrosion additives for rust protection across metals and metal alloys used in cooling systems, including aluminium
- Helps prevent foaming and sediment formation in the cooling system
- Compatible with elastomers used in automotive radiators
Technical data
| Property | Unit | Data | Audit |
|---|---|---|---|
| Density at 20 °C | kg/m³ | 1130.0 | EN ISO 12185 |
| Colour | LILAC | VISUAL | |
| Flashpoint | °C | >110 | DIN 51758 |
| pH value at 20 °C, 50 Vol % | 7.5 – 8.5 | ASTM D1287 | |
| Reserve alkalinity | ml 0.1n HCl | >5.5 | ASTM D1120 |
| Freezing point, 50% solution | °C | -37 | ASTM D1177 |
| Boiling point | °C | 187 | ASTM D1121 |
| Water content | Gew. % | <5 | ASTM D1123 |
| Weight | 5 kg |
|---|
Brand
Ravenol
Ravenol oils and fluids for Land Rover servicing
Ravenol is a quality-led lubricant range for Land Rover engine, gearbox, transfer box, axle, steering, ACE, brake and cooling-system service work. Use this page to browse the Ravenol products we stock for Defender, Discovery, Freelander and Range Rover applications. Oil and fluid choice should be matched to the vehicle, component and required specification, not just the viscosity printed on the bottle. Check the product page for the relevant approvals, GL rating, application notes and Land Rover use before ordering.- For engine service work, see Land Rover engine oil, including VW 505.01 engine oil ideal for Td5 applications.
- For gearboxes, transfer boxes and axles, see Land Rover gear oil.
- For automatic gearboxes, power steering and related hydraulic fluids, see ATF and steering fluid.
- For brake servicing, see Land Rover brake fluid.
- For cooling-system work, see Land Rover antifreeze and coolant.
Only logged in customers who have purchased this product may leave a review.
Our trusted couriers will get your orders to you as quickly and reliably as possible.
Standard UK delivery is next working day. For all orders outside the UK DHL Express provide shipping. You can also collect your order from us!
Free mainland UK postage and packaging on all eligible orders over £99 (terms and conditions apply).
- Return within 14 days of delivery of your order.
- Items must be unused, unopened and in original packaging.
- Faulty items: we’ll cover return postage—keep your receipt.
- Refunds & Replacements are dealt with once the original item is received and inspected.
Returns – quick FAQs
How long do I have to return an item?
Who pays return postage?
What items are non-returnable?
How do I start a return?
Please include your order number and a brief reason for the return.
All parts sold by Twinwoods 4x4 are covered by a minimum 12 month warranty against manufacturing defects.
Some products and brands may carry a longer warranty period where this is provided by the manufacturer. Where applicable, this will normally be stated on the individual product page.
The warranty covers manufacturing defects only and does not cover failure caused by incorrect fitting, misuse, accidental damage, normal wear and tear, or faults elsewhere on the vehicle.
Warranty claims may require the part to be returned for inspection and testing before any repair, replacement or refund is authorised.
This does not affect your statutory rights.
For full details, please see our Terms and Conditions.



Reviews
There are no reviews yet