They start; and stop after 1-2 seconds. The pipes are empty as shown on the picture (stop-state and pipe-state)
Tested it with mods and without any mod, same result (picture is from play without mods) - it says 27.4 but nothing happens, the purple bar stays like its shown, and ZERO oil arrives at the pipe. green doesnt rise again
I have uploaded the savegame here: http://www.psychopathix.net/_autosave3.zip
and all the mods used here: http://www.psychopathix.net/mods.7z
and the log file here: http://www.psychopathix.net/factorio-current2.log
*just saw that the gaz-ones arent vanilla kek