Hudson Commodore

Coolant capacity & service interval

Hudson Commodore coolant capacity ranges from 16 to 18,7 liters. Service intervals require a check every 1000 miles. The data covers 6 configurations.

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

TypeSpecifications
Commodore Eight (1951-1952)
  • Use: Normal
  • Capacity 17,8 liter
  • Capacity 18,7 liter (+ heater)
  • Check 1000 miles
Commodore Six (1951-1952)
  • Use: Normal
  • Capacity 17,8 liter
  • Capacity 18,7 liter (+ heater)
  • Check 1000 miles
Commodore Eight (1948-1951)
  • Use: Normal
  • Capacity 16 liter
  • Check 1000 miles
Commodore Six (1948-1951)
  • Use: Normal
  • Capacity 17,8 liter
  • Check 1000 miles
Commodore Eight (1941-1947)
  • Use: Normal
  • Capacity 17 liter
  • Check 1000 miles
Commodore Six (1941-1947)
  • Use: Normal
  • Capacity 17,8 liter
  • Capacity 18,7 liter (+ heater)
  • Check 1000 miles

Additional Notes

  • The Hudson Commodore Eight covering 1941-1947 carries a cooling system capacity of 17 liters, while the same engine family in the 1948-1951 period drops slightly to 16 liters, reflecting a modest reduction likely tied to revised engine bay packaging or block changes between those generations.
  • The Commodore Eight for 1951-1952 returns to a larger capacity, specified at 17.8 liters as a base figure, with an expanded 18.7-liter capacity when a heater is fitted. The heater addition increases total system volume because the heater core and its connecting hoses become part of the coolant circuit.
  • The Commodore Six for 1941-1947 shares the same dual-capacity specification as the later Commodore Eight: 17.8 liters without a heater and 18.7 liters with one. Despite the Six and Eight being different engine configurations, their cooling system volumes align exactly in that specification row.
  • The Commodore Six for 1948-1951 lists only a single capacity of 17.8 liters, with no separate heater-equipped figure, whereas the Six for 1941-1947 and 1951-1952 both carry the dual-capacity notation. The 1948-1951 Six therefore does not account for heater volume within the listed specification.
  • Across all six configuration rows, the service interval is consistently listed as a coolant level check at every 1,000 miles under normal use conditions. A 1,000-mile check interval reflects the maintenance expectations common to mid-twentieth century vehicles, where frequent underhood inspections were standard practice.
  • The 1951-1952 model year appears in both the Commodore Eight and Commodore Six rows, with both sharing identical capacity figures of 17.8 liters base and 18.7 liters with heater. The overlap of 1951 across two specification rows for the Eight (1948-1951 and 1951-1952) indicates a transitional year where two distinct capacity values apply depending on which specification period is referenced.

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