I was always running out of fuel. Along came the crafting cottages and I started to built. I was happy with 100 tanks. It soon jumped to 250. I thought that was a good number so I hovered around that for awhile. I then jumped to 500, thinking that was it, I don't need anymore. The number kept increasing, 600, 700, 800. I then set my goal at 1000. I reached it and still always feel like I need more. I used it a bit when I was mastering my 4 hour, 8 hour, 12 hour etc. crops. Now all I have left is the 2, 3,and 4 day crops, so I hardly use the fuel. Where do you keep your fuel tank at?