Oscar, you do not know how much my T levels fluctuate during the day. But you should know that having 160 in the afternoon is not normal.
The variation of T levels is different from person to person. Lately, in a period of relative stability, I measured my T levels in the afternoon (once) and in the morning (twice):
9:00 AM: 604 (300-1080)
after a month of stability:
4:30 PM: 523 (300-1080)
after another month of stability:
9:00 AM: 512 (300-1080)
That shows that, at least in my case, the variation in T is minimal throughout the day, and therefore does not justify the jump from 160 to 700 in 6 days that I experienced 1 month off propecia. Period. Of course, it can be different for other men.
As a final note, I would like to add that also Dury experienced a similar jump in his T levels, just before he went on clomid.