If I had the patience to wait for the stars to align to buy motor oil, I'd get Delvac1 5w40 for half that cost. I don't see the point in getting full OCD over motor oil, analysis outfits, etc. Seen enough data like this:
https://jalopnik.com/why-expensive-oil-is-a-waste-of-money-1797241527
https://www.thehulltruth.com/boating-forum/860410-blackstone-labs-oil-comparisons-conclusion.html
It's not that complicated. Blauparts frequently has oil sales, 10-15% off once a month. The 20%+ off sitewide sales happen a couple times a year and that is a good time to stock up. If you subscribe to their emails you will receive a notification.
Delvac 1 ain't what it used to be. I was a big fan of the old CJ-4 version but it's not the same high quality product it once was. And your math is fuzzy...
Delvac 1 is $35/gallon @ walmart. 1 Gal = 3.785L, $35/3.785L = $9.25 per Liter
Ravenol NDT regular price is $45.83 per 5L jug. $45.83/5L = $9.17 per Liter.
As you can see, the regular price Ravenol NDT is actually slightly cheaper than Delvac 1.
If you bought the Ravenol on sale or the Delvac 1 during a rebate promotion I think their price difference would still be negligible.
I have seen higher quality oils, like the ones referenced above produce 1/2 the wear metals as the other brands typically sold at Walmart. Does 1/2 the measured wear during an interval mean anything? I suppose it depends on what value you place on the information.
Oil analysis is a valuable tool, used in a preventative maintenance program. It allowed me to see how poorly Liqui Moly 507 oil performed. If I had just believed the glowing Amazon reviews (which I suspect contain fake or paid shills) I would still be using it. However, I now know and can spend my money on better product.
I also have the information to share. That is the value of analysis.