A long long time ago, I bought a CPO car a few months over 4 yrs old and at the time the CPO brochure available on their website clearly said that, if the car was 4+ yrs old, the warranty would be 2 yrs from the date of this sale rather than the 6th anniversary of the car’s original sale (“in-service”) date which is the most common CPO expiry methodology (or 100K whichever came first, but that did not matter as the car only had 45k).
Long story short I bypassed discussing this w/ the dealership, called the national HQ and after a little back & forth got them to agree and change the VIN’s CPO expiry to the 2nd anniversary of my purchase date. Trust me, I was glad to have those few extra months of warranty coverage.