JonE wrote:I could decide to PC it to an Unlimited at some point but would that affect oldest account status?
A product change doesn't change the open date of the account.
That said there are creditors that perform a "product change" by closing the existing account and opening a new account. Those are not actually product changes. Chase isn't one of them though.
JonE wrote:(total newbie question I concede, but I couldn't figure this one out, and couldn't find any reasonable information).
How are you searching? First hit on a site restricted Google search (just add site:creditcardforum.com to your keywords to search this site using Google) for this site had a post form someone talking about a Chase product change and retaining history. Product changes are a fairly common topic on other sites as well.