Then you have this:
https://www.convertunits.com/from/gallon+[U.S.]+of+diesel+oil/to/ton#:~:text=How%20many%20gallon%20%5BU.S.%5D%20of,The%20answer%20is%2028.555828555829
So all depends what is is. (Ton)
By the straight 7.15 weight per gallon, that's 40,000 lbs of additional boat weight, which...