Engine oil Mobil or Castrol

I live in Oregon. I run 20w50 valvoline vr1 or Castrol GTX.

Mobil 1 0w20 ESP. Advance Auto and some Walmarts have it.

I used to get my 0-40 Mobil at WalMart for my Audi, because they were the cheapest.

Mobil 1 Advanced 15w50 automotive oil. Yes you heard me right. No it doesn’t cause clutch to slip. $25 for 5 quarts at Walmart. Best protection against friction and wear money can buy. 11k and zero issues. No metal shavings on drain plug after break in with factory oil.

ive used Castrol in all my cars ive owned, One being a Kia, and then two Hyundai Velosters (VT and my N), so Castrol Edge 5w30 is what mine gets

Audi uses Mobil 1 at the dealer level. Stick with that.

I've been using Mobil 1 0w30 in my NA 2018 CX5 for 180,000 miles , no issues and runs quieter than 0w20 .

My daughter has a 2016 Civic bought new. First oil change was at 200mi with Mobil1 Extended, and then oil/filter changes at 15,000 or 20,000 mile intervals until 86,500. Switched to Restore and Protect and after 1k miles I changed the filter and cut it open, there were zero sludge deposits, and oil color looked new.

I ran Castrol 5W30 full synthetic in the engine.It burned a quart every 3500-4000.

I noticed when the castrol 508 spec wears. It smells Faintly of onions and beans. Strange smell indeed, when I took my car to street side VW out of Amarillo, Texas.