Opel Ascona A

Differential fluid capacity & service interval

The Opel Ascona A uses differential fluid with capacities ranging from 0.65 liter to 1.1 liter depending on the configuration. Four configurations are covered in the data.

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

TypeSpecifications
  • Ascona 1.2 S (1972-1975)
  • Rear
  • Use: Normal
  • Capacity 0,65 liter
  • Ascona 1.6 (1970-1975)
  • Rear
  • Use: Normal
  • Capacity 1,1 liter
  • Ascona 1.6 S (1970-1975)
  • Rear
  • Use: Normal
  • Capacity 1,1 liter
  • Ascona 1.9 S (1970-1975)
  • Rear
  • Use: Normal
  • Capacity 1,1 liter

Additional Notes

  • The Opel Ascona A rear differential fluid capacity splits into two distinct values across the engine lineup: 0.65 liter for the 1.2 S and 1.1 liter for the 1.6, 1.6 S, and 1.9 S variants.
  • A rear differential capacity of 0.65 liter, as specified for the 1.2 S (1972-1975), is a relatively modest fill volume, consistent with the smaller axle housing typically paired with lower-displacement engines.
  • The 1.1 liter rear differential capacity shared by the 1.6, 1.6 S, and 1.9 S reflects a larger axle assembly, where greater fluid volume supports the lubrication demands of a heavier-duty differential unit.
  • All four configurations carry a normal use condition designation, meaning the listed capacities apply to standard operating environments rather than severe-duty or high-stress service cycles.
  • The 1.2 S entered the Ascona A lineup in 1972, while the 1.6, 1.6 S, and 1.9 S were available from 1970, giving the latter three a longer production span within the 1970-1975 range.
  • No service interval mileage or time-based change schedule is specified for any of the four configurations; only fluid capacity values are listed for the rear differential system.

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