I appreciate that you point out that regular maintenance is the key to passing a smog check. I can see why this would allow you to not have to worry about failing it. My brother is going to be buying his first car this week. I'll have to remind him of the importance of having it maintained regularly.
Regular maintenance and servicing could be very helpful in passing a smog test. It has been found that older or damaged vehicles produces more emission that new vehicles. So, the damaged vehicles should be repaired or replaced. Car service and oil change at a regular interval could be very helpful in reducing such emission.
I like your suggestion to extend the lifespan of the vehicle by providing maintenance at a regular interval. The basic maintenance includes the inspection of different types of fluids used in the vehicle. Such types of fluids plays crucial role in the performance of the vehicle and degrades in time hence needs replacement after certain time interval as mentioned in the owner's manual or as recommended by professional technicians.
Every comment is the result of an experience. We can not make this up.