INFINITI FX, S51 (EU)

Coolant capacity & service interval

INFINITI FX, S51 (EU) coolant capacity ranges from 9,6 to 13,1 liters. Service intervals include checks at 15000 km/12 months or 20000 km/12 months, and changes at 60000 km/36 months, 60000 km/48 months, 80000 km/48 months, or 90000 km/60 months. The data covers 12 configurations.

The configuration chart below lists fill volumes and service intervals for each engine and trim variant.

TypeSpecifications
FX37, S51 (2011-2013)
  • Use: Normal
  • Capacity 9,7 liter
  • Check 15000 km/ 12 months
  • Change 60000 km/ 48 months
FX37, S51 (2011-2013)
  • Use: First change only
  • Capacity 9,7 liter
  • Check 15000 km/ 12 months
  • Change 90000 km/ 60 months
FX50, S51 (2011-2013)
  • Use: Normal
  • Capacity 10,7-11,6 liter
  • Check 15000 km/ 12 months
  • Change 60000 km/ 48 months
FX50, S51 (2011-2013)
  • Use: First change only
  • Capacity 10,7-11,6 liter
  • Check 15000 km/ 12 months
  • Change 90000 km/ 60 months
FX30d, S51 (2010-2013)
  • Use: Normal
  • Capacity 13 liter (with automatic transmission)
  • Capacity 13,1 liter (with manual transmission)
  • Check 20000 km/ 12 months
  • Change 60000 km/ 36 months
FX30d, S51 (2010-2013)
  • Use: First change only
  • Capacity 13 liter (with automatic transmission)
  • Capacity 13,1 liter (with manual transmission)
  • Check 20000 km/ 12 months
  • Change 80000 km/ 48 months
FX30d, S51 (2009-2010)
  • Use: Normal
  • Capacity 13 liter (with automatic transmission)
  • Capacity 13,1 liter (with manual transmission)
  • Check 15000 km/ 12 months
  • Change 60000 km/ 48 months
FX30d, S51 (2009-2010)
  • Use: First change only
  • Capacity 13 liter (with automatic transmission)
  • Capacity 13,1 liter (with manual transmission)
  • Check 15000 km/ 12 months
  • Change 90000 km/ 60 months
FX37, S51 (2008-2011)
  • Use: Normal
  • Capacity 9,6-9,7 liter (Total)
  • Check 15000 km/ 12 months
  • Change 60000 km/ 48 months
FX37, S51 (2008-2011)
  • Use: First change only
  • Capacity 9,6-9,7 liter (Total)
  • Check 15000 km/ 12 months
  • Change 90000 km/ 60 months
FX50, S51 (2008-2011)
  • Use: Normal
  • Capacity 11,5-11,6 liter (Total)
  • Check 15000 km/ 12 months
  • Change 60000 km/ 48 months
FX50, S51 (2008-2011)
  • Use: First change only
  • Capacity 11,5-11,6 liter (Total)
  • Check 15000 km/ 12 months
  • Change 90000 km/ 60 months

Additional Notes

  • The INFINITI FX30d S51 cooling system holds 13 liters with an automatic transmission and 13.1 liters with a manual transmission. The 0.1-liter difference reflects the additional coolant volume routed through the transmission oil cooler circuit in manual-equipped variants.
  • The FX30d S51 produced in 2009-2010 carries a normal-use coolant change interval of 60,000 km or 48 months, while the first-change-only condition extends that interval to 90,000 km or 60 months. The first-change-only designation applies to factory-fill coolant, which is formulated to last longer before the system transitions to standard service intervals.
  • The FX30d S51 revised its check interval between production periods. The 2009-2010 specification sets a check at every 15,000 km or 12 months, whereas the 2010-2013 specification raises that to 20,000 km or 12 months, indicating a change in the recommended inspection frequency for that engine variant.
  • The FX30d S51 2010-2013 normal-use change interval shortens to 60,000 km or 36 months, compared to the 48-month time limit in the 2009-2010 specification. The first-change-only interval for the same 2010-2013 period is set at 80,000 km or 48 months, both of which are tighter than the equivalent earlier-period values.
  • The FX37 S51 cooling system capacity is listed as a range of 9.6-9.7 liters for the 2008-2011 period, reflecting minor variation across production units. From 2011-2013, the capacity consolidates to a fixed 9.7 liters, suggesting a standardization in the cooling system fill volume for that variant.
  • At 13 liters, the FX30d S51 diesel cooling system holds notably more coolant than the FX37 petrol variant at 9.6-9.7 liters. Diesel engines typically require larger cooling capacity due to higher thermal loads and the presence of additional heat exchangers such as exhaust gas recirculation coolers.
  • The FX50 S51 cooling system capacity spans 11.5-11.6 liters for the 2008-2011 period. For 2011-2013, the range widens to 10.7-11.6 liters, introducing a lower bound that was not present in the earlier specification.
  • Across the FX37 and FX50 petrol variants, both the 2008-2011 and 2011-2013 periods share identical check and change intervals: 15,000 km or 12 months for checks, 60,000 km or 48 months for normal-use changes, and 90,000 km or 60 months for first-change-only intervals.

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