Engine oil Mobil or Castrol
Go with whatever is easy for you to source and also meets the VW502.00 standard. I personally run Mobil 1 0w-40 or Liquimoly 5w-40, whichever I can get cheaper.
My 911 has over 100k, I switched to 5-w40 mobil1. I’m sure driven is fine too, but mobil1 is perfect and designed for our cars, cultists be damned.
Mobil-1 FS 0W-40 is a solid choice, and you can’t go wrong with it.
Mobil 1 0w40 FS , it’s the factory fill for the car and the best choice.
If your interval is 30,000km / 20k mi (2Y) then you should use the higher spec VW 503 / 504 (left page) if you have the 15,000km / 10k mi (1Y) interval then you can use the lower grade VW 501 / 502 oil on the right page.
I always use Castrol, good quality oil won't hurt the engine and is just slightly more expensive than off-brands.
Now the easiest one to find that meets my manual requirements is the Mobil 1 euro formula that’s the cool green color. The back of the bottle specifically states it meets VW specs.
If I was spending my own money I would buy Mobil 1.
I'm running Castrol EDGE 0W-40 A3/B4 right now, but feel there is more startup noise than when using Mobil 1 FS 0W-40 European Formula.
Stay away from the stuff that the dealer puts in, the Euro Car formula(5w-30 i believe) that Castrol makes is a Blend, meaning not fully synthetic and it shears and burns really quick.
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