I pay less per quart with Mobile 1 0W20 than I do with Honda's 0W20, so what extra cost?

I bought 12 quarts of Mobile 1 0W20 at $3.75/quart. I think Honda's 0W20 was at $8.00 / quart. Around there. So for better oil, I pay less, go figure.

Yes they were dumping their inventory but even so, I was still paying less per quart with Mobil 1 0W20 than I could get from Honda.