I can remember fifth gear doing this section with a fellow r32 owners car he got slated for ages for allowing the oil to get this bad
https://youtu.be/M7VxOlUVjoA
I’ve split enough engines in my time to know I won’t go wrong doing mine every 5-6k and sooner on something like our last s3
I wonder how old that video actually is to be showing a MK4 R32?
That MK4 R32 will be between 15 and 18 years old now, and even if that video was showing the effects on a (then) 5 year old car, you're talking about an old tech car that isn't built to todays tighter tolerances and oil advancements have come on leaps and bounds since 2005. Don't forget that fuel is a hell of a lot cleaner these days too, with detergent additives that weren't about in 2005.
Nice to see the AAS in use (Atomic absorption flame spectroscopy) - I used to work on one of those daily. Some of the science as explained was a bit iffy. Telling you about changes in viscosity without defining the specification to meet.
The oil that comes out of a newish car after its second or third oil change will be nowhere near as dirty as the stuff in that video. If I had a 15-20 year old hot hatch I would absolutely change the oil every 5k miles.
Modern cars are not subject to old tech servicing requirements due to advances in fuel oil and engine manufacturing. It's not a big loss to do an oil and filter change twice as often as the manufacturer recommends, but it seems wholly unnecessary on a modern car using clean fuels and advanced oils.
If there was a big benefit in doing extra oil changes, the first would be most critical, with any extra wear debis attributed to the running in process.