0.17 boosted the efficiency of boilers and vehicles from their old 50% to 100%, and cut fuel values in half to compensate.

I haven't unlocked the other items yet, but I see that the Burner Generator's efficiency is still 25%, where it should be changed to 50% to match with the 0.17 changes.

Actually after running some tests, I have discovered it is actually far less efficient than it says on the tooltip. It was running at about 12.5% efficiency, and after I edited the item to run at 50% efficiency, it is still running at about 12.5% efficiency.

I found in the code it had the entity's effectivity at 0.25 and the burner's effectivity at 0.25. When I set the burner effectivity to 1 and the entity effectivity to 0.5, it displayed 50% efficiency on the tooltip and also functioned at 50% efficiency.

Right, I'll look at it next time I will update