I have search high and low and cannot find a single thread with someone using HPL or Amsoil oil in a TGDI engine for an extended oil change interval. Is it only possible on PI engines. My asking is because I do about 10ths miles a year on my 2 cars, and it would be great to change in once a yr. On one car I can see doing it 2018 Crosstrek….I’ve seen extended UOA. The other 2020 Equinox 1.5T. I have only seen a few reports going over 6000 mile, mine included.