by Bl1tzX » Sat May 08, 2010 12:29 am
From my experience, chopping them up into branches yields more fuel.
I had two kilns with an equal amount of fuel, then chopped up 2 blocks of wood into branches, put that into one and put 2 blocks into the other.
Branch one won by about 1/6 of the total fuel bar or something. I think it's kinda silly, but oh well.