What is the etiquette for seating arrangement in a car?

[MaciFitz]

Small car seating arrangement etiquette includes: 1. Driver driving: The right rear seat is the first position, followed by the left rear seat, then the middle rear seat, and the front right seat is the last position. 2. Owner driving: The front right seat is the first position, followed by the right rear seat, then the left rear seat, and the middle rear seat is the last position. 3. Owner couple driving: The owner couple sits in the front seats, and the guest couple sits in the rear seats; the gentleman should serve his wife by opening the car door for her to enter first, then the gentleman follows. 4. Carrying a friend couple: The invited friend sits in the front seat, the friend's wife sits in the rear seat, or let the friend couple both sit in the rear seats.