Originally Posted by Wolverine 1945
I would say Duckogram is Right On !!!
I also run Engine & Generator a couple of times during the winter !!!
LOL I think you are referring to a post that I deleted. I felt it did not have enough "tonal quality" for the season.
What I will post is that if one was to read their hymnal (owners manual) one would find where the manufacturer recommends filling the tank for storage!
2014 F-53 reference is on page 88.
2014 E450 reference is on page 240.
You can find it at owners.ford.com.
I'm not a mechanical engineer but I did work in a fuel testing lab back when my hair was short and I had some and I can tell you that you do not want H2O in your benzine or algae in your cooking oil. So whatever method you choose, be safe and enjoy your RV.