Engine oil Opel Astra H Z19DT (1.9 CDTi) — viscosity and approvals

Which engine oil for Opel Astra H Z19DT (1.9 CDTi, 2004–2010) — viscosity, specifications, capacity and change interval.

Engine Specifications

Recommended Oil

Change oil when either condition is reached — mileage OR time. Never exceed both limits simultaneously.

Approved Oil Brands

Castrol Edge 5W-40 / Shell Helix Ultra 5W-40 / Mobil 1 ESP 5W-40

How to Choose Oil for Z19DT

1. Viscosity must match specification — using the wrong viscosity grade is not acceptable. Only 5W-40 is approved for Z19DT.
2. Check the approval code on the label — the can must show ACEA B4 / GM-LL-A-025 compliance. Regular oil with an incorrect approval may damage the engine.
3. Volume — when changing with a new filter, you need 4.2 L. Check the oil level with the dipstick 5 minutes after filling.
4. Do not mix grades — if topping up, use the same viscosity and specification.

Consequences of Using the Wrong Oil

• Oil with a wrong approval for a diesel engine can clog the DPF filter (diesel) or cause excessive oil consumption.
• Too thin oil (e.g. 10W-40 instead of 5W-40) accelerates timing chain/belt and crankshaft bearing wear.
• Too thick oil makes cold starting difficult and increases fuel consumption.

Domande frequenti

What oil goes in a Opel Astra H Z19DT?

Viscosity 5W-40, approval ACEA B4 / GM-LL-A-025, volume 4.2 L. Recommended brands: Castrol Edge 5W-40 / Shell Helix Ultra 5W-40 / Mobil 1 ESP 5W-40.

How often to change the oil in Opel Astra H?

Every 15 000 km or 12 months — whichever comes first. With heavy city driving or short trips, every 7,500–10,000 km.

How much oil does the Z19DT take?

4.2 litres with a new filter. Before ordering, double-check — some Astra H variants with the same engine code may differ by 0.2–0.5 L.