I am considering a 2015 M8560 purchase. I'm curious how much DEF it will use under a moderate load such as a 15 ft shredder mowing regrowth mesquite and huisatche, and I do have some decent grass to mow also 
I am thinking about a 7060 instead, just to avoid the DEF. I know, the 7060 may be at the minimum end of the requirements, but I have mowing with a 15 ft "wore out" Terrain King" behind a Fiat/Hesston 466 DT for 25 yrs. The little fiat only has 46.6 hp, and it bogs every now and then, but it has got the job done for a long time. The tractor, shredder, and ME are all wore out.
I may even look for a "pre tier4" tractor instead, but they cost almost as much as a new one.
Any advice is much appreciated, Gary
I am thinking about a 7060 instead, just to avoid the DEF. I know, the 7060 may be at the minimum end of the requirements, but I have mowing with a 15 ft "wore out" Terrain King" behind a Fiat/Hesston 466 DT for 25 yrs. The little fiat only has 46.6 hp, and it bogs every now and then, but it has got the job done for a long time. The tractor, shredder, and ME are all wore out.
I may even look for a "pre tier4" tractor instead, but they cost almost as much as a new one.
Any advice is much appreciated, Gary