How much oil do you fill your 1.8 astra with after oil change?

For a Vauxhall Astra with a 1.8-liter engine, you typically need to fill it with approximately 4 to 4.5 liters of oil after an oil change. It's important to check the owner's manual for the exact specification, as variations can exist based on the model year and engine type. Always ensure to check the oil level with the dipstick after filling and running the engine briefly, adding more oil if necessary.