I've been thinking this idea for two years .In my case , I bought a 2019 Cadillac XT4 with the 2.0 L turbo which uses 0w20.My 2019 Equinox (1.5L turbo engine) specs 0W20 oil. I really believe that 0W30 would be a better choice.
I find this fact quite interesting: When GM starting using these 1.5L turbo engines in 2016 the oil spec was 5W30. It seems to have magically changed to 0W20 in 2018. I have researched OEM GM part numbers for many of the internal engine parts used in these engines, especially the parts where oil clearances are critical. And from 2016 through at least 2019 the part numbers are identical. Looks to me like the popular reason/excuse given for switching from 30 weight hot to 20 weight being because of so-called tighter tolerances is -V--E--R--Y- questionable. How about this reason: C.A.F.E standards. -all striving for potential fractional increases in mpg.
My 2.0L LSY engine is not the same as the 2.0 L engines used in years past using 5w30. The same with your 1.5 L (LYX) turbo
is not the same as the 1.5L (LFV) turbo engines used from 2016 in Chevy Malibu, Buicks.