i've used Redline 0w20 in 2 of my previous oil changes for my 2014 Subaru Crosstrek. i bought it because i was curious, had coupons, and I knew it was going to be overkill for my car; i wanted to maximize antiwear basically. My car is out of warranty too so I didn't mind that Red Line isn't officially certified, despite claiming API SN / GF-5.
Overall, once the car reaches operating temperatures, it felt smoother and more responsive and it was quieter. In the winter, it does take a while for the car to feel normal.Currently, I'm using Motul because its cheaper and with covid, i'm not driving as much, so Redline feels even more of a waste.
Once the world's back to normal, I would continue using Redline until my stash is all gone. After that, who knows?
Since your car is burning oil, why not use a thicker oil or High Mileage oil?