We had a local guy, Ole Bardahl who made oil treatments. He was well known for pouring his treatment into a car, especially an older worn one, then draining it and driving from Everett to Seattle, or Tacoma, or Olympia with a couple reporters in the car. Never broke down. Some of them before I-5 was built in stop and go traffic. It’s amazing how durable the crank and rod assembly was.
Outside our area he was better know for racing sponsorship, but that’s where it came from. Still around.
http://www.bardahl.com