I certainly understand the price appeal of these two trucks you’re looking at, but I would caution you on tuning something you suspect may already be an issue.
As to the Oasis report, all of these things are just as accurate as Carfax. It’s what the dealer reports, not what actually happens. I once traded in a Jeep that I did some hefty body damage to over the course of its life off-road. Once it made it back to the dealers lot with fresh body work and shiny paint, I looked up the carfax and giggled at the 3 “Oil changes” that were performed on it over the course of the two weeks they were fixing it up for sale.
An oil leak alone usually isn’t cause enough for Ford to buy back a $70k truck, there’s more likely to be a major recurring problem or two that just didn’t get listed as the main culprit.
Personally, I’d look for a well cared for, used truck in this price range.
@FordTechOne Maybe you can shine some light on this and point us all in the right direction as to whether or not a bought back truck is a safe buy?