EMI's recipe tree and "craftable" detection only reads plain contents from a player's inventory slots and container slots. It never queries the Forge capability system, which is how most modern tech mods (e.g. GregTech CEu) actually store fluids and gases in machine tanks and fluid-cell items.
Currently Supported
- GregTech CEu (GregTech-Modern) machine tanks and fluid cells are fully recognized.
Planned
- Support for additional tech mods with similar capability-blindness issues.