COOLSPEC SUPREME OAT LL50 - Summer Coolant & Winter Antifreeze
Product Ref: WIN005
Home Delivery
United Kingdom mainland delivery from £50.00 ex VAT
Delivery to Mainland UK - Customer to off-load (Postcode exclusions apply)
login to saveCOOLSPEC SUPREME OAT LL50 - Summer Coolant & Winter Antifreeze Safety Information
- Refer to the Safety Data Sheet (SDS) before use
- Avoid ingestion and skin/eye contact - wear gloves and eye protection
- Store sealed containers in a dry, frost-free area
- Do not mix with conventional silicate -based coolants unless flushing is planned
- Clean spill immediately; coolant is slippery and harmful to animals if ingested
- Always dispose of used coolant through approved waste handlers.
COOLSPEC SUPREME OAT LL50 - Summer Coolant & Winter Antifreeze Downloadable Documents
COOLSPEC Supreme OAT LL50 Technical Data SheetCOOLSPEC SUPREME OAT LL50 - Long-Life Organics Acid Technology Coolant
COOLSPEC SUPREME OAT LL50 is a premium 50% premixed, ready-to-use long-life coolant formulated with advanced Organic Acid Technology (OAT) inhibitors for superior engine protection and extended drain intervals.
Free from silicates, phosphates, amines and borates, this high-performance coolant meets the demanding requirements of modern diesel, petrol and gas engines operating in both on-road and off-road environments.
Designed for applications where extended service life, reduced maintenance and exceptional corrosion control are essential, COOLSPEC SUPREME OAT LL50 guarantees consistent cooling efficiency while preventing scale, liner pitting and overheating under tough operating conditions.
Recommended Applications
- Modern Diesel and Petrol Engines using OAT/LL coolants
- Agricultural Machinery (tractors, loaders, telehandlers)
- Construction and Quarry Equipment
- Commercial Fleets & HGVs
- Plant Hire and Industrial Engines
- Stationary Engines, Generators and Compressors
- Vehicle requiring Long_life OAT Coolant Meeting Major OEM Specifications
- Suitable for: ASTM D3306, D4656, D4985, D6210 BS 6580:2010 Chrysler MS 9176 CNH MAT 3624, MAT 3724 Cummins CES 14603, 14439 DAF 74002 Daimler Truck DTFR 29D110 Deutz DQC CB-14 Ford ESD-M97B49-A, WSS-M97B44-D GM 1899M, 6277M, 3420, B 040 1065 IVECO 18-1830 Jaguar Land Rover STJLR.651.5003 Leyland Trucks LTS 22 AF 10 Mack 014GS 17004 MAN 324 SNF Mercedes-Benz 326.3 NATO S-759 Opel QL130100 Renault 41-01-001 Type D Rolls-Royce Bergen 2.13.01 Volvo VCS VW Group TL-774 D&F (G12, G12 Plus) UNE 26361-88 Suitable to use where G30, G33 & G34 is specified.
Key Benefits
- Extended Long-Life Performance: Provides up to 5 years or 240,000 km protection (application dependent), reducing downtime and maintenance costs
- Advanced OAT Inhibitor System: Organic corrosion inhibitors protect aluminium, cast iron, solder, brass and steel components without forming abrasive deposits.
- Ready-to-Use 50% Premix: No need for dilution, ensures consistent freeze, boil and corrosion protection with soft, deionised water.
- Superior Corrosion & Cavitation Protection: Prevents water pump wear, liner pitting and internal corrosion - critical for high-load diesel engines.
- Silicate -, Borate - & Phosphate - Free: Reduces risk of drop-out, gel formation and abrasive deposits common in traditional coolant formulations.
- Excellent Thermal Transfer Efficiency: Helps engines run cooler under heavy load, improving fuel efficiency and engine longevity.
Typical Test Data
| Parameter | Typical Value |
| Appearance | Red/ Orange Liquid |
| Density @ 20°C Kg/m³ | 1.09 |
| Equilibrium Reflux Boil Point | 172°C |
| Freezing Point - 50% conc. 50% H²O | -38°C |
| Reserve Alkalinity - ml HCI N/10 | 6.1 |
| pH @ 25°C - 50% conc. 50% H²O | 8.2 |
| Water Content | 50% |
Please note: These are typical values and do not constitute a specification. Actual Performance may vary.
COOLSPEC SUPREME OAT LL50 - Summer Coolant & Winter Antifreeze Specification
- Product Code: AZO
COOLSPEC SUPREME OAT LL50 - Summer Coolant & Winter Antifreeze Frequently Asked Questions (FAQs)
Is COOLSPEC SUPREME OAT LL50 ready to use?
Yes. It is a 50% premixed coolant, requiring no dilution.
Can I mix this with standard (silicate) antifreeze?
Mixing is not recommended. For best results, flush the system before converting to OAT coolant.
How long will this coolant last?
Typically up to 5 years or 240,000 km, depending on engine type and duty cycle.
Is it suitable for older engines?
Yes, provided the cooling system is in good condition and the OEM approves OAT coolant. Some older systems may require hybrid coolants instead.
Does this coolant protect aluminium engines?
Absolutely. OAT technology offers excellent aluminium corrosion protection, ideal for modern lightweight engines.
What freeze protection does LL50 provide?
Approx -36°C, making it suitable for UK, EU and cold-climate operation.
COOLSPEC SUPREME OAT LL50 - Summer Coolant & Winter Antifreeze Delivery Information
Tanks:
The delivery of a tank can be confusing as each manufacturer offers a slightly different service and lead time. Please refer to our Delivery Information page. Standard tank deliveries are "kerbside" which means the tank will be delivered to the kerb only and not positioned further. Should you have specific delivery requirements or restrictions, please contact us to discuss.
Tanks Over 2500L – Articulated Lorry – Customer Offload:
These tanks will be delivered on an articulated vehicle (approximately 16.5m long x 2.6m wide x 3m high) which has no offloading on board, it is the customer's responsibility to offload the tank, which may require a telehandler / forklift. Curtain sided vehicles are also used, so please note that if there are obstacles or hanging branches on the road to the delivery site etc, the driver may refuse to drive the vehicle to the customer's location due to the possibility of damaging the vehicle. Please let us know if there are any obstructions before delivery, so we can arrange alternative transport.
18 Tonne Tail Lift HGV
This vehicle is the size of the largest bin lorries (for comparison) and is approximately 8.2m long x 2.6m wide x 4m high, often curtain sided so please note that if there are hanging branches etc, these vehicles will not attempt to drive down due to the possibility of damaging the vehicle and so it is recommended that a smaller vehicle is requested. Tanks will be lowered to the ground but not positioned as this is a kerbside delivery. If a smaller vehicle is required, please email us at sales@fueltankshop.co.uk quoting your order number and name.
HIAB Delivery
HIAB delivery is available but must be requested and there will be an additional cost for this service. If a HIAB delivery is required, please email us at sales@fueltankshop.co.uk quoting your order number and name, and we will come back to you with a price for this service.
Accessories:
Most accessories will be delivered within 1-3 working days (certain products and postcodes may take longer, please check the product page for update to date information). If you require them quicker, we can on occasions offer a next day service (please contact us to discuss). If the item(s) are out of stock, we will advise you of the expected lead time, and you will of course have the opportunity to cancel with a full refund.
COOLSPEC SUPREME OAT LL50 - Summer Coolant & Winter Antifreeze Returns Information
Customers may return items within 14 calendar days (as per our Terms & Conditions) - refer to section 7. **
All Items must be returned unused, refunds cannot be issued for used or previously installed items.
Please be aware that returning a tank can be complicated and expensive, so please check that you are ordering the correct item (we suggest checking the dimensions very carefully).
If you wish to return goods, please complete the form on this page to provide further information.
Once your request is approved, a valid Returns Authorisation Number (RAN) will be issued to initiate the returns process along with information on how & where to return your order along with any costs involved.
Please DO NOT return any goods without this authorisation. Goods cannot be accepted without this.
Returns are not accepted at our Minehead Office, please wait until we contact you before returning any goods.
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