What type of engine oil is suitable for the Passat?
2 Answers
According to official recommendations, the Passat should use SN-grade or higher 5W-40 or 0W-40 engine oil. The functions of engine oil: Reduce friction and high temperatures; minimize gas leakage and prevent external contaminants; protect against contact with water, air, acidic harmful gases, and components; buffer the pressure rise in the engine cylinder ports; flush away dirt generated on the working surfaces of components. Precautions for changing engine oil: Perform the change while the engine is warm to ensure the old oil is drained as thoroughly as possible; add the correct amount of oil; after adding oil, start the engine and check for leaks in all components. Run the engine for 3 minutes to confirm the oil level reaches the normal mark.
I've been running an auto repair shop for over a decade and often get asked about engine oil by Passat owners. For Volkswagen models like the Passat, it's best to follow the owner's manual recommendations, such as oils meeting VW spec 502.00 or 504.00 standards. Typically, diesel engines use 505.01, while gasoline engines commonly use 5W-30 or 5W-40 full synthetic oils that can handle high temperatures and high-speed operation. From my experience, premium brands like Shell Helix Ultra or Mobil 1 offer good performance at reasonable prices, providing excellent engine protection against wear. Don't overlook climate factors – in northern winters, use oils with good low-temperature fluidity like 0W-30, while in hot summer regions, choose higher viscosity oils to prevent overheating. Remember to regularly check the dipstick and top up or change the oil when levels are low. I recommend changing every 5,000-7,500 kilometers – don't skimp on this maintenance, or you'll significantly shorten engine life. Oil selection directly impacts performance and safety, so never cut corners.
