Is there a cost associated with changing the motor oil?

I just got an '11 Viano. Can anyone recommend a reasonable brand of motor oil? 🙏

How many liters and what grade of oil is needed for an oil change?

How many liters of oil does a Smart car need for an oil change?

Has anyone changed the transmission oil?

Today, the maintenance technician suggested switching to Shell's Yellow Bottle motor oil, mentioning that Castrol's oil with cleaning features might cause more oil leaks. Has anyone used lower-quality oil before? Is it usable?

Do I need to remove the oil pan to change the oil?

Is there a cost associated with changing the motor oil?

Is it necessary to change the transmission oil at 40,000 kilometers?

Which is better for fully synthetic motor oil, Castrol or Mobil?

Has anyone with the 2019 GA6 changed the transmission oil? Is it necessary to change it?