When it comes to selecting an oil, different people are driven by different factors. Oil cost is not a key factor for me. I find changing oil on my vehicles to be a messy chore, so my key drivers are extended drain capability, API certification, and a definitive claim by a major oil company that the oil has been tested and is suitable for long OCIs. As a result I use Mobil 1 Extended Performance which claims 15k miles or one year capability, and I change my oil once a year, usually no more than 10k miles. I don't trust boutique brands to have the kind of scientific and relevant data that ExxonMobil has to support its claims.
One year I let the M1 EP go to a 15,614 mile OCI and sent out a sample for analysis. The UOA was beautiful, viscosity still in spec, TBN of 2.2, and wear metal rates all well below Blackstone's Universal Averages.