Riley 4

Differential fluid capacity & service interval

Riley 4 uses differential fluid with a capacity of 1,28 liters. Service intervals include checking at 1500 km and changing at 9000 km. The data covers 2 configurations.

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

TypeSpecifications
  • 4/72 (1961-1969)
  • Rear
  • Use: Normal
  • Capacity 1,28 liter
  • Check 1500 km
  • Change 9000 km
  • 4/68 (1959-1961)
  • Rear
  • Use: Normal
  • Capacity 1,28 liter
  • Check 1500 km
  • Change 9000 km

Additional Notes

  • The Riley 4/68 and 4/72 share an identical rear differential fluid capacity of 1.28 liters, a figure consistent with the compact rear axle housings typical of small British saloons from that era.
  • The 1.28-liter capacity applies as a service fill level, meaning the quantity expected during routine fluid changes rather than a full overhaul or dry-fill scenario.
  • Under normal use conditions, the rear differential fluid interval calls for a check at 1,500 km, a relatively short inspection interval that reflects the maintenance culture common to vehicles of the late 1950s and 1960s.
  • The fluid change interval for both the 4/68 (1959-1961) and the 4/72 (1961-1969) is set at 9,000 km under normal use conditions, placing routine differential service at a moderate frequency by the standards of that period.
  • The specifications for the 4/68 and the 4/72 are numerically identical across capacity, check interval, and change interval, indicating no revision to rear differential service requirements between the two variants despite the model transition in 1961.

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