What type of coolant does a Infiniti M45 use?

The Infiniti M45 coolant type depends on the model year. Newer models use long-life OAT or HOAT coolant (often pink, blue, or orange). Older models use traditional green IAT coolant. Never mix types — check the specs below for your year.

How much coolant does a Infiniti M45 hold?

The Infiniti M45 cooling system typically holds 6-10 quarts total. A drain-and-fill replaces about 50-60% of the coolant. For a full system flush, you'll need the complete capacity amount plus extra for bleeding.

Can I mix coolant colors in my Infiniti M45?

No — mixing different coolant types can cause gel formation, clogged passages, and overheating. If you don't know what's in the system, do a complete flush before adding new coolant. Use only the manufacturer-specified type.

How often should I change coolant in my Infiniti M45?

Modern Infiniti M45 models with long-life coolant can go 100,000 miles or 10 years before the first change, then every 50,000 miles. Older models with green coolant need changes every 30,000 miles or 2 years.

❄️Coolant Type

Infiniti M45 Coolant Type

Find the correct coolant type, color, and capacity for your Infiniti M45. Covers all years with flush intervals and mixing compatibility.

Quick Answer

The Infiniti M45 uses manufacturer-specific coolant — typically long-life OAT or HOAT formula. Never mix different coolant types. Check the year breakdown below for your specific coolant color and capacity.

2008-2013

Coolant TypeHOAT or IAT

Coolant ColorGreen, orange, or pink

Total Capacity6.0 - 10.0 quarts

Drain & Fill Volume3.0 - 5.0 quarts

Change Interval60,000 miles or 5 years

Concentration50/50 with distilled water

Notes

→NEVER mix different coolant types or colors — flush completely when changing brands
→Always use distilled water, not tap water, when mixing coolant concentrate
→Check coolant level when engine is COLD — opening the radiator cap when hot causes severe burns

Shop on Amazon →Full Repair Guide →

2003-2007

Coolant TypeHOAT or IAT

Coolant ColorGreen, orange, or pink

Total Capacity6.0 - 10.0 quarts

Drain & Fill Volume3.0 - 5.0 quarts

Change Interval60,000 miles or 5 years

Concentration50/50 with distilled water

Notes

→NEVER mix different coolant types or colors — flush completely when changing brands
→Always use distilled water, not tap water, when mixing coolant concentrate
→Check coolant level when engine is COLD — opening the radiator cap when hot causes severe burns

Shop on Amazon →Full Repair Guide →

Frequently Asked Questions

What type of coolant does a Infiniti M45 use?: The Infiniti M45 coolant type depends on the model year. Newer models use long-life OAT or HOAT coolant (often pink, blue, or orange). Older models use traditional green IAT coolant. Never mix types — check the specs below for your year.
How much coolant does a Infiniti M45 hold?: The Infiniti M45 cooling system typically holds 6-10 quarts total. A drain-and-fill replaces about 50-60% of the coolant. For a full system flush, you'll need the complete capacity amount plus extra for bleeding.
Can I mix coolant colors in my Infiniti M45?: No — mixing different coolant types can cause gel formation, clogged passages, and overheating. If you don't know what's in the system, do a complete flush before adding new coolant. Use only the manufacturer-specified type.
How often should I change coolant in my Infiniti M45?: Modern Infiniti M45 models with long-life coolant can go 100,000 miles or 10 years before the first change, then every 50,000 miles. Older models with green coolant need changes every 30,000 miles or 2 years.

Infiniti M45 Repair Guides

→Infiniti M45 Coolant Flush →Infiniti M45 Thermostat Replacement →Infiniti M45 Radiator Replacement

Browse all Infiniti guides →Browse all Infiniti M45 guides →

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