Regular fluid on the third change.
MMM shaft came loose and tore open the filter down there, of course resulting in the loss of all the fluid (didn't notice all the fluid behind me and kept trying to get it back to the garage to take a look at it after the clunking PTO noise till the machine wouldn't move anymore)
Not shutting down when seeing or smelling fluid. (pinhole in the FEL line, leaking quick disconnect)
Continually maxing out the tractor when using the FEL to dig a ditch along the property.
Pulling my huge lawn roller in high gear, stopping so suddenly that it bent the roller connect up in a "V" shape.
Using the grader box on sod at full speed low, after three hours of stump digging. (that's what finally did it)