Auto mechanics often call motor oil the "blood" of the vehicle. If you do not maintain your car by regularly changing the oil, your car will eventually have problems and break down. Volkswagen Jetta TDI's (Turbo Diesel Inject) are no different and require regular maintenance to ensure the vehicle will work problem-free for many years and miles. Because they have a diesel engine, these cars have specific oil requirements.
Diesel engines require a specific type of oil to ensure performance. Volkswagen specifies that you use CG-4 rated motor oil for the Jetta TDI. This should be clearly stated on the outside of the motor oil container.
The Volkswagen owners manual specifies that the Jetta TDI engines should use 5W30 during the cold winter months. This will help avoid engine warnings when it takes too long for the cylinder head to get oil pressure. A heavier weight such as 10W30 should be used during warmer months.
The frequency of changing motor oil use to be every 3,000 miles, but that has changed with newer cars and synthetic oils. The recommendation for the Jetta TDI is every 10,000 miles or every 12 months, whichever comes first.
