Sorry for the late replies, I should check here more often...
fordexpylvr: Thanks! You're going to like your '17. No salt here. I remembered one time there was an ice storm and they salted the roads ONCE. My 03 explorer I bought here in 06 has absolutely no rust on the bottom. I think you're getting one of the cleanest ones!
jexpedition07, I agree. I hear the 5.4 is a solid engine once the bugs are worked out, and there's not many to correct.
bmoe, The f150 drivers (all DI engines in general) are saying their 3.5 ecoboost are having some minor issues with carbon buildup on the intake valves, mainly caused by the oil blowby from the passenger side pcv valve circuit. The JLT oil catch can is installed inline with the passenger side pcv valve and will trap most of the oil going into the intake preventing most of the carbon buildup. Its also the least expensive, easiest to install solution. literally less than 10 minutes to install. I think its a good idea to get! I also use CRC intake valve and turbo cleaner before each oil change (1 so far) and empty the oil catch after every tank of fuel. Its a full cup by then. Another member mentioned Trasko oil filters and they look really good too. I bought one awaiting the next oil change.
Thank you stamp11127, 1997scebfex, and dogdad!