I will throw my hat in the ring here.
Talking about oil always opens a can of worms
I can only tell you what I do and it's worked for me for the past 10+ Subarus. Again, this is what works for me, there is always more than one way to skin a cat. Lots of oil and filters out there that you can use. I try to get oil and filters that are easily obtainable and reasonably priced. I think the key is to change your oil and filter at minimum based on what the Owners Manual states.
I especially think it's a good idea to do this yourself because it's easy to do. If you get under your car every once in awhile you may notice stuff things that are amiss before they become big problems. Also, I highly recommend staying away from quick lube places. I've been on the boards for decades now and there is horror story after horror story about things that have gotten screwed up big time. I've seem a number myself on friends cars. I realize not everyone has a spot were they can do an oil change. In that case find a good mom and pop place or dealer to do it. These places typically have a vested interest in doing it right so you come back for another oil change or something else.
If my motor is a turbo I tend to change at 3K mile intervals, NA like my Impreza 5K miles. This way if I go over a little I don't sweat it. I typically use Mobil 1 brand but I also like Castrol. My filter of choice is WIX 57055XP as they have a higher quality construction and does have the higher bypass valve pressure similar to OEM. You can get them for a good price here >>
RockAuto<<
Now that the oil filter is up top, which is very nice and convenient, you can't pre-fill it anymore. You can however crank the motor over without starting it to circulate the oil into the system first. It's very simple.
After your oil change, before you start the car for the first time, quickly push the accelerator (gas pedal) to the floor and hold it there. Turn the key or push the start button and hold it to let the motor crank for a little bit. Only crank it for 5-10 seconds, you can do it a couple of times as long as you don't let the gas pedal up. It won't start as long as you have the accelerator all the way to the floor. This will get oil flowing in the system and put oil in the filter. After that, take your foot off of the gas pedal and start the car. I like to let it run and check for leaks at the oil filter and drain plug.
From time to time, I will get a
Blackstone Oil Analysis done on my cars, I get prepaid kits. I think it's a good idea but that's just me.
I also always install a Fumoto Valve, it makes oil changes a snap, I like how you can drain the oil when it's super hot and minimize the risk of getting a burn. I like to use the short version with a clip on nipple and tygon hose. I know some people feel the need for a safety clip they sell but I've been using these valves since 97 and never had one open accidently. I've moved this one over from my BRZ.