A grab driver also told me he skips servicing his car at official SC and only returns for major servicings. He says his warranty is not affected as long as don't skip do many times.

I only 😂

Not every SC is so "negotiable".

My SC (Honda) - I sent for servicing which included brake servicing. SA confirmed they will remove all wheels for brake checking job. I requested them to rotate my wheels without balancing or doing alignment after the brake job when they fix back the wheel - just swap the front wheels to back and vice versa.

They refused, saying this can only be done if I opt and pay for tyre rotation and alignment.