2019 GTI, 502 spec oil is preferred per VW tech support.
Just picked up my 2019 GTI this evening. First thing I noticed when i popped the hood was the sticker specifying 508 0W-20 oil. Searched and didn't see any threads talking about it so thought I'd get the word out. Not sure what the best options are for this yet.
Just bought a 2019 GTI, and I have been on the phone with numerous dealerships that all seem not to know what the facts are. I thought that my owners manual and sticker under cars bonnet that clearly states VW 508 spec 0w-20 required with no substitute allowed except in an emergency, you can use up to 1/2 quart of VW 502.
Turns out that is the wrong information. I went straight to the source and called VW customer care and explained my case and concern about the confusion. There is a simple way to find out and have this information logged and saved to your customer number/VIN. Just give them the VIN to run and they will come back with what oil that particular VIN requires. It turns out that my 2019 GTI requires VW 502 spec 5w-40 (call was made 11/1/2019).
Now I was nonchalant about why I was calling them. I was calling because the dealership filled my 19' GTI with VW 502 5w-40 Castrol Professional synthetic instead of the 508 0w-20. I was concerned that if this service damaged the engine (as too thick oils can affect VVT and cylinder deactivation in all engines) or there was ever damage in the future, VW could fall back on this and I wanted to get it corrected if that was the case.
If a dealer messes up your car servicing it incorrectly, it is not a warranty issue through VW and the owner of that vehicle will have to take up issue with that dealership. I've had this happen in the past with another manufacturer, it's no fun. So whether the internals are slightly different or that it has a different oil pump,... according to my cars VIN per VW it requires VW 502 5w-40 motor oil and there is now a paper trail with this logged call telling me so. If for some reason they go back on what they said and state VW 508, well, now VW has to honor warranty if any issues arise from use of VW 502 spec oil (which I am fairly certain none will).