The 2017 Infiniti QX30 uses Nissan/Infiniti Long-Life Coolant (LLC), premixed 50/50 with distilled water, or an equivalent OEM-approved HOAT coolant labeled for Nissan/Infiniti vehicles.
The question matters because the coolant protects the engine and cooling system from corrosion and overheating. Using the wrong coolant or mixing incompatible types can cause deposits, reduced cooling efficiency, and potential engine damage. The guide below outlines the approved coolant options and practical maintenance steps for the QX30.
Coolant type and compatibility
The vehicle’s cooling system is designed for Nissan/Infiniti Long-Life Coolant (LLC). This HOAT-type coolant is formulated to resist corrosion in aluminum engines and to provide long service life. For best results, use premixed LLC (50/50) or a compatible concentrate diluted to 50/50. Always favor the OEM-specified coolant or an approved Nissan/Infiniti substitute.
Here are the practical options and cautions you should consider when refilling or replacing the coolant:
- Nissan/Infiniti Long-Life Coolant (LLC) premixed 50/50 with distilled water, labeled for Nissan/Infiniti vehicles.
- Nissan/Infiniti Long-Life Coolant Concentrate—dilute with distilled water to achieve 50/50 mix before use.
- Ensure the coolant is HOAT-type and silicate-free; do not use universal green (old-style) coolant or Dex-Cool unless explicitly labeled as compatible with Nissan/Infiniti.
- Avoid mixing different coolant chemistries in the same system, which can cause deposits and corrosion.
Bottom line: Use Nissan/Infiniti LLC in the correct 50/50 premixed form (or properly diluted concentrate) and avoid non-approved coolants to maintain the QX30’s cooling system.
Maintenance and replacement considerations
Keeping the cooling system in good shape means following the recommended service intervals and performing periodic checks. The exact replacement interval is specified in the owner's manual and may be a long-life schedule, typically spanning several years or tens of thousands of miles depending on driving conditions. If you’re unsure, consult a certified Infiniti service technician or refer to your vehicle’s maintenance booklet for the official schedule and any model-specific nuances.
The following steps help ensure the coolant remains effective and the system stays healthy:
- Use only the recommended coolant type and maintain the 50/50 mix unless dilution guidance specifies otherwise.
- Inspect the coolant level regularly and top up with the same type if needed.
- Have the cooling system flushed and refilled by a qualified technician at the prescribed intervals or sooner if you notice overheating, white exhaust, or coolant leaks.
- Check for leaks, hoses, clamps, and the radiator cap during routine maintenance.
Regular maintenance and using the correct coolant help prevent overheating and prolong the life of the cooling system components.
Signs your coolant needs service
Be aware of symptoms that may indicate coolant problems, such as rising engine temperature, steam or a sweet smell near the engine, visible leaks, or white residue near hoses. If you notice any of these signs, consult a technician promptly to diagnose and address the issue before it leads to more serious damage.
Summary
In short, the 2017 Infiniti QX30 requires Nissan/Infiniti Long-Life Coolant (LLC) in a 50/50 premixed form or an equivalent OEM-approved HOAT coolant. Use only approved products, avoid mixing different chemistries, and follow the owner’s manual for service intervals. Proper coolant choice and maintenance protect the engine and cooling system for years to come.