Use the new Green Fluid Tank Wagon that gives you the less space (15k) - 100% credit to DellAquila (I just changed it from big to small)
Mods introducing new content into the game.
1.0.1 Updated for Release 1.0 18.0.1 Updated for v18 17.0.1 Updated for v17 16.0.2 Fixed crash 16.0.1 Ready to use 00.0.1 Initial Release