I love how he casually says, oh! only about 3 quarts came out!
I've heard similar oil change (or lack thereof) stories over the years. One person said to me once, "I thought I changed the oil when the oil light comes on."
When I was a nooblet working on the lube rack at a Honda dealer, I did an oil change on a Civc. Quite literally a half quart of black, sludgy oil came out when I removed the drain plug.
I rushed to the service advisor to tell him He said "Unless there is a major engine noise or the oil light stays on, dump oil in it and ship into wash."
I shit you not, I put oil back in it, fired it up and that little Honda ran like it never had an oil issue.
I was impressed to say the least.