Hey there,

Sorry that I didn't write that earlier.
Traincraft isn't compatible with the Biodiesel from Immersive Engineering. I change that on my own every update, but all you have to do is an entry in /src/main/java/train/common/api/LiquidManager.java.

Greetings Agonija

Thanks for the headsup.

Placing this here to remember it
biodiesel = FluidRegistry.getFluid("biodiesel");