The element of required service checkups and actions. They are
necessary in those frequent intervals in order to keep the warranty
intact ?

There is apparently a difference of frequency of required service of
say, Mazda (Tribute) versus Hyundai Tucson or Santa Fe

This has brought a new view for me as I am accustomed to frequent,
very low cost oil changes and maintenance on my older Volvo. How I was
treated, those years ago, by a Volvo corporate rep who invalidated my
request to address my car issues, thus I would never dream of buying a
new Volvo again.

But back to the point. If the Hyundai Santa Fe required service every
3K miles and the Mazda required it only every 5 to 7.5K, then those
ludicrously exorbitant oil changes take on a different view.

Perhaps the nature of newer cars is now out of the hands of the owners
and into the hands of designated techs with automotive computers.

I have always trusted myself with oil changes than anyone else. I have
always used better oil and better filters, etc. Particularly at $48
an oil change at the Hyundai dealership

Any sage words on this subject are welcome.