Here is the UOA I recently had done on my wife's 2015 Ford Expedition with the 3.5L Ecoboost. Oil is Mobil 1 5w30, filter is a Motorcraft FL-500S: As you can see, the fuel is quite high and the oil is diluted. I ran into this on several UOAs I had done on the 2011 F-150 I previously had, but it was never this high. So I decided to take it in to the dealer to get it checked out while still under warranty. The service writer was puzzled about why I took the vehicle in, since it was running fine, and he'd never even heard of a UOA. Regardless, they agreed to look at it. This is what they told me in response: So, "It's supposed to be like that". I'm not really satisfied with that, but I'm going to let it go for now and keep doing UOAs and using a 5k OCI. At least it's in their system that I raised the issue. Will report back if anything changes.