as long as there are no ECU re-flashes, 'secret' recalls or TSBs to be addressed, anyone including yourself can do anything to the car - just save the receipts in case there's a question with a warranty claim. Receipts should include a description/part number of fluids and filters used.
SOME car makes MAY make a stink over a warranty claim if certain OEM fluids aren't used. Not likely to be a problem for normal maintenance.
SOME car makes MAY make a stink over a warranty claim if certain OEM fluids aren't used. Not likely to be a problem for normal maintenance.