No, I only use one pair at a time. I also use Powerstep inserts in them, which have helped alleviate some plantar fasciitis problems I was having, presumably due to my very high arches. Since I'm logging 120+ miles per month on my shoes, 4 months is probably the maximum (3 months would be better) I should use them... and I'm getting really close to that with my current pair.
We had a wicked thunderstorm yesterday evening -- high winds and very heavy rain. Actually worse than any weather we had when Dennis passed by Sunday night and Monday morning. When it calmed down, I went running in the leftover light rain... which was actually great. I was expecting hot and humid. Someone actually pulled over to ask me whether I was deliberately running in the rain or was caught and needed a ride. LOL.
RUN: 6.1 miles... Time = ~42:30. Good run... felt strong... I have done this one a lot faster (under 40 minutes), but primarily because I went all out on the first half which has a lot of downhill. I felt pretty good about the second half, much of which is uphill.
Tonight is leg night
... Planning to run Friday AM or evening. I might be better off doing it in the morning before the soreness really sets in!