Except it's a used car and there are no lemon laws in Missouri for used cars. Whole different ballgame from new, or even different states because some do have laws regarding the sale of used cars.
The van in question with the oil problem was used when we bought it, although we bought it from a Ford dealership that took it in on trade. The moral of the story was that what was written in stone when they told my wife was far from the truth, and I called out the guy who told her that right in front of the boss and the entire staff. And, I had the TSB in my hand, that my buddy who worked for Ford actually wrote, so I was armed with facts they could not dispute. Hardball, and I stick to my advise. And, I never had to invoke anything about any lemon laws in my state, my facts were irrefutable, and they knew it. I think my situation and path of correction are the same as needed here.