Summary
ACDelco Purple OEM G-65 Coolant (Australia/NZ) coolant data, from ACDelco's own source. ACDelco Purple OEM G-65 Coolant (Australia/NZ) is a concentrate P-Si-OAT ethylene glycol-based coolant listed by General Motors (ACDelco). The manufacturer's page we checked does not list OEM spec codes. Stated service life: 8 Year or 500,000km.
Specifications
| Brand | ACDelco |
|---|---|
| Maker | General Motors (ACDelco) |
| Product | ACDelco Purple OEM G-65 Coolant (Australia/NZ) |
| Part numbers (as published) | 19380140 |
| Sizes (as published) | 5 Litre |
| Chemistry | P-Si-OAT |
| Base glycol | Ethylene glycol |
| Colour | Purple |
| Premix or concentrate | Concentrate |
| OEM / industry specs listed | not published |
| ASTM standards listed | not published |
| Service life claim | 8 Year or 500,000km |
| Freeze point (as published) | not published |
| Free-of claims | not published |
| Datasheet | not published |
| Source | manufacturer page |
| Last checked | 22 October 2026 |
Specs and approvals listed by the manufacturer
No OEM approval or spec codes are published on the source we checked. That does not mean the product fails any spec. It means the manufacturer did not list one there. Check the product label or ask the manufacturer.
Compatibility notes
- Chemistry is listed as P-Si-OAT. Mixing different chemistries can shorten coolant life. See OAT vs HOAT vs IAT and use the mixing checker before topping up.
- Colour is listed as Purple. Colour is a dye, not a spec, so two coolants of the same colour can be different chemistries. See coolant colours explained.
- Sold as a concentrate: dilute with distilled or deionised water as the label directs. See premix vs concentrate and the freeze and boil calculator.
Note: Sold in Australia and New Zealand. The catalogue says the full OEM approval list is in separate ACDelco flyers.
Where to buy
We did not find a retailer link on the manufacturer's page that we could check. Try the manufacturer's own site: ACDelco product page.
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Sources
- ACDelco product page (status on 22 Oct 2026: 200)