Engine oil Shell or PENNZOIL

using a heavier oil weight has been an old trick to help with oil consumption in Subarus for a long time now. I used to use Rotella 5w40 (before the reformulation) in my old 04 Baja Turbo and that particular oil was the best to keep the oil burning down.

SP certified oils have better LSPI protection than SN, and SP is what Subaru requires for this generation.

I use PUP 0w20 in mine. Lots of tests and UOA show that Pennzoil Ultra Platinum is the best non-boutique oil you can buy. But honestly any top shelf oil will work. 5k km intervals are more important than brand with a turbo engine.

My regular since i think 2014 or so has been helix ultra 5w40 running in all my vehicles currently.

I run 0w30 in my F82 M4 as that's what BMW and Shell recommend.

Do her a favor a change the oil, with Valvoline Restore and Protect or Pennzoil Ultra platinum, it will quite down a little and it would be great for the car.

Pennzoil Platinum Synthetic. My 1988 740 has near excellent compression at 245k og miles.

At the very least, make sure you're using quality oil like Mobil or Castrol or Pennzoil.

Ive used T6 with good results. The major drawback with T6 is foaming, it's less than great in that regards.

BMW switched from Castrol to Penzoil years ago...but both cause oil starvation in The S65 motor