Parts for your 2010 Holden Commodore-Coolant

2010 Holden Commodore Coolant — What It Does and How To Look After It

Coolant is absolutely relevant and fitted to every 2010 Holden Commodore, across V6, V8 and LPG variants. This is backed by Holden’s VE Commodore Owner’s Handbook (MY10), GM Holden Service and Warranty information, and GM’s Dex‑Cool specifications (GM6277M). The vehicle uses a pressurised liquid cooling system that relies on the correct coolant to control engine temperature and protect the alloy components inside.

In simple terms, coolant carries heat away from the engine and helps keep it in the sweet spot for performance and longevity. It also raises the boiling point and lowers the freezing point of the mix, cuts down on corrosion and scale, reduces cavitation, and lubricates the water pump seals. The side bonus: it feeds warm fluid to the heater core, so the cabin heats up quickly on a chilly morning.

The 2010 Commodore is designed for a long‑life, silicate‑free OAT coolant (commonly seen as red/orange “Dex‑Cool” type). When using concentrate, it should be mixed 50/50 with demineralised or deionised water, premix options make life even easier. Sticking with the correct specification prevents chemical clashes that can sludge up passages and chew out gaskets and water pumps.

For servicing, owners should plan on replacing the coolant at around 5 years or 240,000 km (whichever comes first), per Holden’s long‑life schedule. From there, test the strength and pH annually, and replace sooner if contamination is found, the colour goes muddy, or if cooling system work has been done. Capacity varies by engine, so it’s best to follow the vehicle handbook or a reputable service guide for exact volume and bleeding points.

• Only open the cap when the engine is cold, and always refill to the “FULL COLD” mark on the reservoir.
• Never mix green or blue silicated coolants with the red/orange OAT type, if mixed, flush thoroughly before refilling.
• Use demineralised water with concentrates to avoid scale and deposits.
• Bleed air properly after a drain to prevent hot spots and overheating.
• Inspect hoses, clamps, radiator cap, thermostat, and water pump during each service for leaks or wear.
• Dispose of old coolant responsibly, it’s toxic to pets and the environment.

Looked after properly, the Commodore’s cooling system stays stable, the heater works a treat, and the engine’s metal bits don’t corrode from the inside out.

Popular questions about 2010 Holden Commodore coolant

What coolant type should a 2010 Holden Commodore use?
It’s designed for a red/orange long‑life OAT coolant meeting GM Dex‑Cool specifications (e.g., GM6277M or later equivalent). Use a 50/50 mix if using concentrate with demineralised water, or a quality premix labelled as Dex‑Cool compatible. Avoid mixing with conventional green silicated coolants.

How often should the coolant be changed?
Under normal use, about every 5 years or 240,000 km. After the first replacement, keep testing annually and refresh sooner if the coolant is discoloured, the concentration is off, or if any major cooling component has been replaced.

Can they top up with plain water or mix brands?
For an emergency top‑up, a small amount of demineralised water is okay, but restore the proper 50/50 ratio soon after. For brand mixing, it’s safer to stick with one reputable Dex‑Cool compatible product, do not mix OAT with conventional green coolant. If unsure what’s in the system, flush and refill with the correct coolant.