Spoilage on Rubia is intended to be consumed for a specific unlock. It should really not be used as fuel, and doing so can make your life much more difficult when you want to get said unlock after completing the Makeshift science stage. The amount you get is very carefully metered out for this. As such, I will not be adjusting the drop rate of spoilage, nor providing a setting to adjust it.
If your issue is that planet hoppers need fuel to function, I recommend bringing this up to thesixthroc in his planet hopper mod, to make it possible to operate the Planet Hopper without fuel. Otherwise you will need to wait to be in the ghetto science stage.