A friend of ours sold his throughly worn out '69 chevy nova with 300k miles on it to an oil company that crushed it along with other older cars in exchange for the right to stall on cleaning up their refinery. If a belt breaks on the road you have a ready spare. This can save you a tow to a garage and the high cost of an emergency replacement. Keep the wheel with the least worn of the old tires being replaced as a spare. This saves the quart you would put in and produces one less quart of waste oil.
OIL IS OIL .
Buy oil based on its price and the qualities of the merchant selling it that you want to support. Many valuable observations but be aware that this fellow is trying to get you to buy a book .