Board Thread:Questions and Answers/@comment-108.244.32.39-20121211033445/@comment-5785654-20121223132458

FINAL SOLUTION: Creosote oil can only be pumped out of the bottom of the oven. You don't pump out the actual liquid, you pump out glass bottles full of it using Buildcraft pipes. DON'T PUT IT INTO A TANK! It will get stuck and cannot be removed. Instead pump the bottles into chests.