Riley 1.5

Manual transmission fluid capacity & service interval

Riley 1.5 manual transmission fluid capacity ranges from 2,56 to 2,84 liters. Service intervals include checks at 1600 km and 5000 km, and changes at 800 km, 9600 km, and 10000 km. The data covers 5 configurations.

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

TypeSpecifications
1.5, Mk III (1961-1965)
  • Use: Normal
  • Capacity 2,56 liter
  • Check 5000 km
  • Change 10000 km
  • Code: 4/1
1.5, Mk II (1960-1961)
  • Use: Normal
  • Capacity 2,56 liter
  • Check 1600 km
  • Change 9600 km
  • Code: 4/1
1.5, Mk II (1960-1961)
  • Use: Initial service
  • Capacity 2,56 liter
  • Change 800 km
  • Code: 4/1
1.5, Mk I (1957-1960)
  • Use: Normal
  • Capacity 2,84 liter
  • Check 1600 km
  • Change 9600 km
  • Code: 4/1
1.5, Mk I (1957-1960)
  • Use: Initial service
  • Capacity 2,84 liter
  • Change 800 km
  • Code: 4/1

Additional Notes

  • The Riley 1.5 Mk I carries a manual transmission fluid capacity of 2.84 liters, which is the largest fill volume across all three marks listed in the specifications.
  • From the Mk II onward, the manual transmission fluid capacity drops to 2.56 liters, a reduction of 0.28 liters compared to the Mk I figure.
  • The Mk III (1961-1965) is noted as a transaxle rather than a standalone transmission, distinguishing the drivetrain configuration from the Mk I and Mk II units.
  • Under normal use conditions, the Mk I and Mk II share an identical change interval of 9600 km, while the Mk III specifies a slightly longer change interval of 10000 km.
  • The fluid check interval differs notably between generations under normal use: the Mk I and Mk II call for a check every 1600 km, whereas the Mk III extends the check interval to 5000 km.
  • Both the Mk I and Mk II include an initial service entry specifying a fluid change at 800 km. An early drain at low mileage is a common practice intended to remove metal particles generated during the break-in period of new gear surfaces.
  • The Mk I initial service change interval of 800 km applies to a 2.84-liter fill, meaning the early drain involves a larger fluid volume than the equivalent Mk II initial service, which is tied to the 2.56-liter capacity.
  • No check interval is listed under the initial service entries for either the Mk I or Mk II, as the initial service rows specify only a capacity and a change interval at 800 km.

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