Any questions about tire warranties is in your owners manual.
As for contacting FOMOCO for an answer, I will just say don’t hold your breath waiting for even a hint of an answer to a question.
What they will likely (and repeatedly…) do is to tell you to contact the Ford dealer in your area.
A few years ago a Ford dealer here gave me a line of BS about only flushing auto transmission fluid and NEVER changing the filter or cleaning the pan. “Not in 15 years have we…” according to them.
I politely emailed Ford 3 or 4 times asking a benign question of whether FOMOCO recommends this type of procedure. The only thing they would say is to talk to the Ford dealer who spouted this BS.
“Our network of highly trained and skilled Ford dealership technicians will be glad to answer any questions you may have”.