Board Thread:Questions and Answers/@comment-5586977-20130402030209/@comment-8540798-20130508212812

It seems to be able to be configured with different Liquids in the Left and Right sides. However, only clicking on them with an Oil Bucket has any effect, in which the Fuel Liquid graphic will display in the centre. Water, Lava, Mob Essence, Sludge, Biofuel, and Sewage don't have any effect. Other than not, I'm not 100% on the GUI's purpose.