If you ever get a chance to look at all the PIDS that the ford IDS can read on these trucks its strictly built around being able to deny warranty.
There is pids for
distance driven with water in fuel light
key cycles with water in fuel light on
different levels of warning for water in fuel ect ect
this is all to deny high pressure pumps and injectors
they also have these coolant additive checks, for if down the road you have an oil cooler fail they can be like, oh well you never did the aditive or where is your reciept for the check strips ect ect. Cant say that i blame ford because owners are usually the main issue that ford and we as consumers pay for for waranties. All it does in the end is drive the cost of the trucks up. So i could care less
In fact if you have the light come on saying you need a fuel filter you have gone WAY too long on that fuel filter, they should be changed every 10k oil at 5k reguardless what the dash says. I take oil samples on mine and 5k is all i would feel comfortable running for an oil change unless i ran allot on the highway hot shotting or something of that nature