I'm playing with version 1.0.2 on Factorio 1.1.19

I'm confused about the supposed increase in efficiency by superheating the steam from a boiler to use in a steam turbine. I have 1 boiler feeding 1 superheater outputting steam to 1 turbine. Under my testing the superheater is consuming 3.6MW worth of fuel and the boiler is consuming 1.8MW worth of fuel with the turbine outputting 5.8MW of power. I can visually detect the superheater is using twice the amount of fuel that it is supposed to.

When you mouse over the superheater, does it show Efficiency: 200% in the fuel section of the info panel?
If not, does it show another mod has changed it?

I had the mod Space Exploration installed along with it's dependencies. In the fuel panel it showed the superheater having a fuel consumption of 3.6MW and no mention of fuel efficiency 200%. With the Superheater mod installed on its own it works as intended.

I had the mod Space Exploration installed along with it's dependencies. In the fuel panel it showed the superheater having a fuel consumption of 3.6MW and no mention of fuel efficiency 200%. With the Superheater mod installed on its own it works as intended. Space Exploration must be overriding machine fuel effectivity values somewhere.

I've updated, let me know if that fixes the problem

Yep, The new update fixed the issue and now is compatible. Thanks for the quick response.