I have a 6yr 70000 esp .....does ford offer longer terms and can it be purchased after I have owned my truck....I have 34000 on it now

 

7 years max from purchase date.
You can purchase up to your original 3 year 36,000 mile warranty ends and supposedly after that with a dealer inspection.

If you already have 6 years I'd not worry about it the cost to get an extra year won't be worth it.