^^^
Oh boy, you do go through a lot pad and may be a little too quickly. I am not sure how much your car weighs, but mine is 3,160-3,200 lbs depending on fuel, and my PF08s last me about 3 to 4 3-day weekends, and I would imagine my top speeds are a little higher than yours
How is your front/rear wear ratio? Mine's about 2 to 1.
P.S. I would recommend OG Racing or Apex Performance for all PFC stuff, great prices and service.