Long time ago, I was in a parts store. Another customer came in to get stuff for an oil change. He asked for the cheapest filter they had and asked for the cheapest oil they had. Then he noticed the Slick 50 display and asked the counter guy if it was good. Counter guy said "We sell a lot of it and nobody has brought any back".
Cheap oil guy was impressed and bought a bottle. I'm betting he could have bought the best oil and filter and come out cheaper with better protection.
Eric