Name: ACDelco Red OEM G-40 Coolant (Australia/NZ)
Brand: ACDelco
SKU: 19380142

Summary

ACDelco Red OEM G-40 Coolant (Australia/NZ) coolant data, from ACDelco's own source. ACDelco Red OEM G-40 Coolant (Australia/NZ) is a concentrate Si-OAT 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.

Disclaimer: General information only, not professional advice. Always use the coolant specified in your vehicle owner's manual. Using the wrong coolant can damage an engine.

Independent and not affiliated. Coolant.com is not affiliated with, sponsored by or endorsed by any coolant or vehicle maker or retailer listed here, and we earn nothing from these links. Brand and spec names are used only to identify products. Every field comes from the manufacturer's own page or datasheet, checked 22 October 2026. "Not published" means we could not find it in that source. We record no prices.

Specifications

Brand	ACDelco
Maker	General Motors (ACDelco)
Product	ACDelco Red OEM G-40 Coolant (Australia/NZ)
Part numbers (as published)	19380142
Sizes (as published)	5 Litre
Chemistry	Si-OAT
Base glycol	not published
Colour	Red
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	phosphate-free
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 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 Red. 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.

Always check your owner's manual first. Use the coolant spec printed in your owner's manual or service information. A listing here is the manufacturer's own claim (meets, exceeds, approved or recommended, worded as they put it). It is not our approval and not a fitment guarantee for your vehicle. If in doubt, ask your dealer or a qualified mechanic.

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)

ACDelco Red OEM G-40 Coolant (Australia/NZ): specs and approvals