Wow - doing an oil change in a tux...you really are a snob, I like that! Ha ha — kidding of course, all in good fun.
You say, “I still think sourcing a quality oil.....”. And based on your prior comments, that appears to say Kirkland brand is not quality oil. Do we know that to be factual? You’re attempting to introduce evidence that’s not proven, or entered. The judge is going to kick it out, and say, “whats next, move it along, I have a tee time at 1:15.”
You need to prove your case and provide the facts upholding your belief that Kirkland oil is bad, or low quality.
As to OE parts being the best - some truth to that, but also many aftermarket parts are equal to the OE stuff. I served many years as in-house council for a large manufacturer, that produced for automotive and heavy truck OEM’s, as well as several large aftermarket companies - lots of electronic and electromechanical items built on the same production lines, just stamped with different identifiers and put in different color boxes at the end of the line.....in my opinion, big name online retailers have tainted the reputation of the quality aftermarket parts suppliers — Offering OE parts and then a multitude of aftermarket versions, some of which can be 20-30% below the OE and true quality aftermarket stuff. The waters have been polluted big time, and it’s doubtful it will get better.
And lastly, I too love a good dirty martini - Vodka please, with 2 olives.
Cheers