Yes, it's a dealer specific thing. I got into a huge debate with some intellectually challenged individual that swore up and down Toyota is providing a 100k mile warranty. I provided screen shots of the official warranty terms from Toyota's website. I went to various Toyota dealer's websites that were advertising this warranty and dug into the fine print. It's aftermarket offering the dealer is throwing in to entice sales. Also, with these types of "warranties", some will require you to have your car serviced at said dealer. Others will require you to exactly on time with your maintenance.
