There are two separate processes a work that can darken your oil quickly.
EITHER it is oxidation (via hot spots in the engine or if its just a weaker lubestock, of the currently fashionable thin kind) OR it is doing a great job putting deposits into suspension, i.e. cleaning.
Sometimes it is hard to tell which process is at work. You ask yourself
"is my oil getting dark because the engine is high mile and its pulling deposits out? or is it subject to oxidation by either hot spots in engine or blow by or just being a bit thin for this engine, or maybe its winter and you have more blowby, or u do a lot of short trips etc etc"
Conversely when your oil stays clean a long time (as it does with both my Nissans) I ask myself
"Is the oil very stable, or my Nissans are very tight w/ no blowby, or is the detergent pack simply not removing deposits well in this engine?"
I sometimes switch between Mobil 1 and Valvoline Synthetic High milage ( which i know to be high detergent and perhaps different different detergent than the M1) to check which of those factors are at play.
but even my Valvoline high milage stays clean a long time.
Conclusion: My engines are tight, and have minimal deposits despite being very high milage ( 166,000 for the VQ40de and 178,000 for the VK56de respectively) and the lubes I use are not overly oxidation challenged by the loads in these engines ( which makes sense big engines have big wear surfaces, to spread out the load, plus they are both NA so run cooler than turbo oil etc etc)
Being in Florida so I never get a truly cold start probably doesn't hurt either.
I remember in the 90s I owned a VW Passat with the 6 cylinder engine ( which I lived) and the oil got black very quickly.
but it was winter in minnesota.... (so lots of cold start blowby AND the VR6 motor was known for hot spottingon the oil, hence the Summer spec of 20w-50 and the winter spec of 15w-40 for this gasoline engine)