Here's why:
* Year of manufacture: The exact engine oil requirements vary based on the year your Astra was manufactured. A W-registration could span several years, and different model years have different specifications.
* Engine type: While you mentioned 1.4 16v, there may be subtle differences in engines within that designation.
* Oil type: The correct oil type (synthetic, semi-synthetic, mineral) and viscosity (like 5W-30 or 0W-20) depend on your engine's requirements.
To find the correct oil for your Vauxhall Astra, I highly recommend the following:
1. Consult your vehicle's owner's manual: This is the most reliable source of information. It will specify the exact oil type, viscosity, and even the brand if recommended.
2. Check the oil cap: Often, the oil cap will have a sticker or markings indicating the recommended oil type and viscosity.
3. Contact a Vauxhall dealership or a qualified mechanic: They can access information specific to your vehicle's VIN and provide tailored guidance on engine oil.
Important Note: Using the wrong engine oil can damage your engine. It's crucial to stick to the recommended specifications.