Independent profile; not affiliated with or endorsed by Castrol. Facts below come from the cited public sources (checked October 2026). Where a fact could not be sourced it says "not published". Product availability and qualifications change, so confirm with the supplier before you specify or buy.
Quick answer
Castrol: Castrol ON PG25 (OAT) and PG25T (IAT), pre-diluted direct-to-chip fluids. Reported qualifications: Castrol ON PG25 and PG25T announced as validated for NVIDIA AI infrastructure (18 Aug 2026). This is an independent profile with cited sources. Details we couldn't verify are marked "not published".
Key takeaways
- Independent profile, no affiliation or endorsement.
- Segment: Data-center liquid cooling.
- Headquarters: Pangbourne, United Kingdom.
- Prices are not published here.
- Confirm current specs with the supplier.
Castrol at a glance
| Item | Detail (sourced) |
|---|---|
| Segment | Data-center liquid cooling |
| Headquarters | Pangbourne, United Kingdom |
| Ownership / corporate | Part of bp |
| Fluid base | Propylene glycol (PG25) |
| Publicly reported qualifications | Castrol ON PG25 and PG25T announced as validated for NVIDIA AI infrastructure (18 Aug 2026) |
| Pricing | not published |
| Datasheet values beyond those quoted | not published |
Castrol coolant products
Castrol ON PG25 (OAT) and PG25T (IAT), pre-diluted direct-to-chip fluids.
Comparing data-center fluids?
Open comparator →Questions to ask before specifying
- Which hardware (cold plate, CDU) vendor approvals does the exact product hold?
- Is it supplied ready to use (e.g. PG25) or as concentrate?
- What are the fluid maintenance limits (concentration, pH, conductivity, inhibitor level)?
- What sampling and top-up program is offered?
- Lead time and regional supply?
How to compare it with alternatives
Use the data-center coolant comparator and the NVIDIA DSX Ready list. Background: what is PG25?, direct-to-chip vs immersion, CDU coolant maintenance, and the supplier directory.
Frequently asked questions
Is Coolant.com affiliated with Castrol?
No. This is an independent profile based on public sources.
What coolant does Castrol make?
Castrol ON PG25 (OAT) and PG25T (IAT), pre-diluted direct-to-chip fluids.