Mechanic here. First of all before you try anything. What oil are you putting in the car? I had a Subaru with bad oil consumption that almost completely stopped when I switched from 5w30 mobil 1 to 5w40 Rotella t6. It won’t hurt anything to try. I’ve done this a few times with older cars and the consumption usually decreases significantly. Some oil brands evaporate a lot easier than others and I have owned many old shitboxes that consumed oil.
Even in my current dodge ram, I was getting some oil consumption with 5w20 while towing my camper every weekend, so I switched to 5w40 and it has stopped.
It doesn’t necessarily mean that there’s anything significantly wrong with the engine. Usually with age the tolerances are a little bit larger and a heavier oil helps to first of all stop the wear and also take up those slightly larger clearances. The heavier oil can also resist vaporizing over time.
Has it been getting colder? That will also affect it