Look at this! After less than one fuel bottle…. What can cause this?

http://s13.postimage.org/cxeyq09vb/2..._51_43_253.jpg

http://s14.postimage.org/mfvnz7d5t/2..._51_33_412.jpg

http://s9.postimage.org/9k3gnvlen/20..._51_03_698.jpg