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.