I usually follow the "extreme duty" guidelines in the user manual, but I've never seen on that suggested 3K miles, usually 5K is extreme duty interval which is already short compared to today's 10K interval changes.
I'm a life long mechanic that believes in preventive maintenance over dealer recommendations-
I also want the engine to last 200k + if possible...
Remember, the twin turbo on our 2.0 is manufactured to super tight tolerance. All the way down to a micron... (a human hair is about 70 microns)
Forced induction, gasoline direct injection engines naturally produce more carbon deposits.
Premature wear from carbon deposits in the oil causes wear to the impeller shaft and bearings, increasing the gap between the two surfaces.
This is a major cause of turbo issues, which often lead to catastrophic engine failure.
But if you plan to sell it after a few years,
you'll be fine following the dealer recommendations-