There will be massive resistance; to the point that it won't take place unless mandated.
Here's why: My son is going to graduate college soon and start work Boeing Aircraft..I can assure you he knows nothing about oil. One of the jobs he held while in high school was a "porter" at a new car dealership. Before anyone comes up with preconceived notions of his duties, he did not empty garbage cans and clean toilets.
There were two employees on site at 6 am; the service manager and my son. The service manager would read the customer complaints for vehicles dropped off after hours for service. Realize that even at a major metropolitan new car dealership; some mechanics are really good at electrical work, while another may be good with automatic transmissions, etc. The manager would give my son the keys and tell him to go out on the parking lot and find the blue Impala and pull it up for "Larry." It would go like this until all the cars are positioned for service, when the $35 hour Union Mechanics start work at 8 am, the cars are waiting for them.
There was only one mechanic who got two service bays all by himself. This guy did nothing but oil changes...He had two lifts. He could look at a car and tell you the size socket needed for oil change. My son would pull in a car for him, he would run it up on the lift and take one of his sockets off his belt clip, chuck it into his air ratchet and btwwwwwf! off the drain pan bolt, letting the socket and oil fall into his positioned drain pan. Then he would undo and throw away the oil filter. While this car is draining, he'd pull a second car into the other lift and start over. While the SECOND car is draining, he would go back to the first car, replace the drain plug, install a new filter, let the car down off the lift and fill with bulk oil; then go to the second car and repeat while my son would pull out the first car and bring another one in.
Back and forth like this, the "oil change monkey" could crank out 8 oil changes an hour, all day long, EVERY DAY and eat a sandwich, drink a soda, etc. Oil changes are the NUMBER ONE reason owners visit the stealership service department. Dealers aren't going to let this go without lobbying their legislatures.