I never bought an extended warranty until I bought my 2015 Platinum used in 2018. It was from a third party, not Ford. Best decision I ever made. When it was ready to run out this spring, the Ford dealer suggested I have the truck inspected and repair a very minor rear main leak. The warranty repaired the leak and other minor things that I didn't even expect them to repair. All total I figure I ended up about $1000 to the good on the deal.