Near the end of the factory warranty on our 2010 F250 diesel I received an offer for an extended warranty from the dealer. Added another six years and out to 100k miles.
Fast forward to after I purchased the extended warranty and just before the factory warranty ran out I had a minor issue with the factory TPMS. Our service writer checked and told me the warranty was about to expire. I checked all my paper work said six more years and and about 60K miles. Called the dealer I purchased the warranty from and they said if the extended warranty is purchased by the original purchaser of the vehicle the warranty starts when the vehicle was first put into service by the original buyer. A phone call to my attorney who in turn called the general manager and the factory service rep settled the issue. My warranty is now out to 100k and another 6 years.