Wanted to try this with my mod pack, but found that it doesn't work with Krastorio. I've verified that Krastorio is the mod conflicting with it by stripping the pack down to base+Configurable Fuel mod and then adding them back one by one.

Can probably get it to work right by adding Krastorio2 as an optional dependency.

While it could fix it by changing the dependency, there's a much easier solution. You can just disable Krastorio2's reconfiguration of fuel values in the mod settings menu.

Yeah, that figures as much, krastorio also modifies fuel values, so it overrides it.