Engine oil Mobil or FUCHS

Mobil 1 5w30 and oem Subaru filter. I change mine pretty religiously at 3750 miles. I know it might be overkill but I’d rather be safe than sorry and if my engine blows up I will for sure know it wasn’t my fault for neglecting maintenance.

Extractor all the way. As for The amount left behind, it is inconsequential if you are maintaining a short oil change interval. I've seen a couple YouTube videos showing maybe 3 or 4 oz left behind.

Anything Dexos2, my fiancé worked at a chev dealer and I was getting their bulk 5w30 dexos2 at cost and my LSPI issues went away, mobil1 ESP went in last oil change at 250k km

I've been using Mobil1 in my car for three years because the garage I worked at had a contract with their local distributor, and that's what I got at a steep discount. Last year I put Total's equivalent oil in it, absolutely no discernible diffrence between the two.

I run 5w30 Mobil 1 ESP with a Mann filter every 10k kms on my 7.5R. Got a great deal on it when it was on sale. It meets VW ratings, and I feel like that is really what is important.

I am using Liqui Moly now, but was using Valvoline/Mobil 1.

Got my car at 36k miles, and used the Valvoline/Mobil 1 up to ~300k miles and no major issues…

I use 5w-20 full synthetic from Mobil One. I change it every 5k miles, no more, and never have any issues with it.

4.5 L is the Ideal for Mazda 6 2.5 non turbo, I'm from the same country as you. I'm using fuchs titan 5w30 for two years and I recommend you do the same, I noticed quieter engine.

Installed new oil and filter, plus BG oil flush, ran at idle for 30 minutes (warm-up, plus 15 minutes). Changed oil and filter again, using Mobil 5W40 Euro oil.

Make sure you don't run Mobil 1. Subaru engines tend to shear Mobil 1 down to a lower weight oil quickly.