is there anyway i can limit the players amont of barrels a player can put in ? 

Hello,

I think this is what you need :

  "Maximum stack size for diesel engine (-1 to disable function)": -1,​

Thank you so much :)

The line "Maximum stack size for a diesel engine (-1 to disable the function)": 30, does not work!
If you move the entire stack 1 time, then everything works, but if you move the stack of diesel again, then you can put more than 30. It also works, through the right mouse button - 1 transfers 30 pieces, the second time transfers everything that is in the inventory

P.S. I use a translator, sorry if something is not clear