Bump

Sadly there is no easy way to do this at present.

The file you'd have to modify to change this value is the .exe itself, the fuel values are stored in binary in there somewhere. It *can* be done, technically speaking - elsewhere on this forum is a powershell script that Mr. Scoot wrote that modifies the executable such that the carrier inventory is larger - but finding the right value and then making a script such that people can apply it conveniently is much more fiddly and time consuming than changing a simple value in a text file and distributing that via steam.

In short - there's no easy way, and the hard way is hex editing via trial and error until you find the right value, then saving that value somewhere and making a script to do it more programatically.