If you have any oil contamination factors such as using primarily 100LL
fuels, a lot of engine blowby, and are not able to control the
operation for minimum contamination, I agree the oil should be changed
fairly often. But I have a 1700 hr TTSN O-320E2D in a 172M that now
only flys about 30 hrs/year. I change oil (and always filter too) only
every year since the oil stays unusually clean. It takes nearly 20
hours before it even loses its green and gets coffee colored. At change
I've randomly checked the oil analysis and it always comes back normal.

The oil was Mobil straight grade during its initial 700 hours and has
been Shell 20W50 for the last 1000 hrs. We are based in a low
contamination area (Minnesota and Wisconsin), and burn 80 Octane or
autofuel to minimize lead contamination. When we were flying it more,
we changed oil only every 50 hours. Consumption remains 1 qt every 30
hrs. The engine remains quite cold blooded on CHT and oil temp.

I climb at higher airspeeds, cruise it leaned and with lower power
settings, avoid 100LL, am careful to purge the combustion products on
shutdown, always preheat but don't continuosly heat during the winter,
& watch the baffling and engine external cleanliness. Interestingly it
never has had particularily good compression numbers, but always has
had excellent "bounce"