doesn't matter. Every use case is different, but the results will be analogous; cheaper oil performs worse over time. You could have engines looking like those in under 100k miles aswell, with stuck rings and all.
A lot of people would you agree with you (ex: the old addage: You get what you pay for).
Expensive oils shine if you are doing OCI's > 10,000 miles, or if your engine is particularily hard on the oil with high temps.
The evidence that I've seen in the extreme high mileage vehicles on forums and on social media shows
that the oil used doensn't matter. They all used cheap oil.
For example, take the Million Mile Honda Accord. "Joe" aka "Million Mile Joe" is the insurance claim adjuster, who changed his oil about every 5,500 miles with ordinary oil. There is a 1990 Honda Civic with 500,000 miles on youtube with a husband/wife traveling performers who are always on the road who changed the oil every 5,000 miles with ordinary oil.
If you look online at the cars going 300k+ miles, they all seem to use cheap oil.
Now if you go a step up from cheap oil, to at least a full synthetic Dexos 1 Gen 3 approved oil (Like SuperTech),
that should offer a cushion. My opinion is that if you went 300k miles since new with a SuperTech Dexos 1 Gen 3 approved oil with reasonable oil change intervals and did an engine tear down afterwards, you would have the identical outcome as compared with if you used any expensive oil.
