I ran a Husky 2100 with 32" and 42" bars in cedar which is relatively soft and with the 42" you had to feed it quite a bit slower. I would think 60" would really really slow the saw down and could only be used in soft woods, no way on oak. Now watch somebody prove me wrong.
It's kind of like an 84" bar on a 090, that much chain really takes it out of the saw. The next time I use that big bar it will be on a 137cc 090G not a regular 090.
The Husky 2100 is for sure a great saw, but it's only 6 cubes and has it's limits even if it could oil a mile long bar.