I love that analogy! What's missing is the rinse in our engines. Draining the old oil takes care of most of the dirt.
Dirty oil will lead to deposits inside those tiny little openings all through our modern engine. What do you think of engine oil flushes? Overkill?
The oil I use is then recycled. I question oil that is "%50 good" too. It may have lubricating quality, but I don't want dirt cycling through my motor. But that's just me..
I have a 2015 gt that I bought new. I changed the original oil at around 1,000 miles to full synthetic Mobil 1 and now use Pennzoil Ultra Platinum. I always use Motorcraft filters. I'm retired so I enjoy working on my car. The oil life guage is interesting but I go by oil color. When the...
Ford recommends 87. It's in the owner's manual.
I do get a little better gas mileage with 93 so I mix it up. I would stay on 93 but it's over 40 cents more than 87.