That’s because you know with any modern API (or ACEA) motor oil, it doesn’t matter one bit for 99% of applications. It could be a 0W20 synthetic or a 10W30 mineral, and for any reasonable interval (OCI) and for any reasonable temperature range, you will be completely fine.
I came to BITOG year’s ago to find “the best oil for my car”, I now buy almost any oil, based mostly on price, because I know almost anything will work for my application. Your price of $0 was very reasonable, I would have said yes as well.