Easy to contact. Easy to purchase. Pick up or delivery available. We chose pick up as wanted the item quickly. Staff at shop when picking up were very friendly and helpful. Item is fantastic ( broke discs). Thank you. Will shop again if looking for car parts.
Radicool P-OAT 20L - Castrol
Check delivery options
Australia-wide delivery
Australia-wide delivery
Get your parts delivered across Australia, with delivery options and costs shown at checkout before you pay. Have a delivery question before ordering? Contact our parts team for help planning your purchase.
Download your tax invoice
Download your tax invoice
Buying for your workshop, business or personal vehicle? Download your tax invoice after purchase for your records. Keep your purchase details handy for bookkeeping, warranty enquiries or future reference.
Returns & warranty
Returns & warranty
Buy with confidence knowing help is available after your purchase. Eligible items can be returned within 30 days of purchase, and our parts team can guide you through return or warranty enquiries.
Radicool P-OAT 20L
Castrol Radicool P-OAT is an engine coolant, supplied as one 20L pack. This concentrate is diluted before use to achieve the required cooling-system protection. Phosphated organic inhibitor technology makes this concentrate suitable for vehicles that specifically require a P-OAT coolant.
Key benefits
- Helps protect cooling-system metals against corrosion and cavitation.
- Contains no nitrites, amines, borates or silicates.
- Helps protect compatible cooling-system metals from corrosion.
- Helps limit cavitation-related damage in suitable cooling systems.
Applications and compatibility
For the stated Japanese and Korean vehicle requirements and compatible aluminium, cast-iron, copper and alloy cooling systems.
Check coolant compatibility before filling or topping up. Follow the concentrate or premix instructions below and the vehicle manufacturer’s service procedure.
Application note: Match the required coolant technology and specification; coolant colour alone does not establish compatibility.
Application note: Dilute to 33-50% with distilled or de-ionised water; freezing protection between -16°C and -37°C depends on concentration.
Specifications and performance claims
- ASTM D3306 (I) (Concentrate)
- ASTM D6210
- JASO JIS K2234
- Suitable for use in vehicles from Japanese and Korean manufacturers
- Suitable for use where a coolant meeting Ford WSS-M97B57-A1 is required (Concentrate)
Product details
| Brand | Castrol |
|---|---|
| Part number / MPN | 3429903 |
| Pack size | 20L |
| Quantity supplied | 1 |
| Product function | Engine coolant |
| Supply form | Concentrate |
Payment & Security
Payment methods
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.

