Quick oil change business has been doing premium or tiered pricing like this for a long time. They are almost always much higher priced than independent service shops. The attraction for vehicle owners is convenience of no appointment and short wait times. Many auto owners are willing to pay a premium for the time savings. But not all. Making it an optional service is good business. But you must deliver what you promise!
Maybe premium pricing could be charged for “canned jobs” that have tightly specified service and drop in service. An even higher rate for set appointments and guaranteed time delivery.
I used to charge higher rate (overtime or rush-rate) for customers who wanted “rush” jobs, remote break-down service, over-night service, etc. Also premium for expedited parts delivery such as air freight, courier, and even cabs sent to get parts…
Average vehicle owner would rarely make time an issue when it would cost more. They always wanted faster service for free. Offering expedited service as an option often ended their complaints. Businesses and fleet owners would often gladly pay extra to get money making equipment back in operation.