Engine oil Castrol or OEM Volkswagen

Castrol edge is just fine, even the cheapest one is likely better than whatever was good 20 years ago.

295,000 miles using Castrol GTX high mileage and fram XG filter

Michigan I use 0w20 Castrol Edge all year.

As long as you're not getting cheap gas station brand oil, you'll be fine. I've been using Castrol Edge 5w40.

Mate, just get Castrol Magnatec 5w30 full synthetic and change it every 8000km or 1 year, don't fall for snake oil propoganda

If you are using VW original oil then stick to it and the service interval. 15 years 229,000km later mine is going strong. I did mess up by doing service at 15k km all these years. Sticking to 12k is best. Instead try iftex system D. Makes a very noticeable difference. More important I feel is changing the air filter more often. And compulsorily changing diesel filter every year.

I use Castrol EDGE 5W-30 LL Fully Synthetic Engine Oil on my B48 pre LCI G21 no issues at all and complies with BMW specifications

Been running 87 and 5w 40 on my mk7.5 for the last 40k of ownership. She loves it, no tics stutters or hiccups at 65k miles.

Castrol is fine

Ho una Golf 7 1.4 TSI 122CV del 2014 quindi con motore EA211. Ha all'attivo 157000km, da quando ho fatto 140000 km devo rabboccare 1l di olio ogni 2700km.