All the infos about cars are easily available. It chances nothing, most buyers of car simply dont care enough to get fundamental knowledge about cars. If you would value the time it takes for an average car buyer to get fundamental knowledge it would cost way more than what they overpay so unless you already have above average knowledge it makes no sense to dig into it. You are better off asking someone who has the knowledge and no incentive to fool you aka a friend not the sale person.