Thats a good question! I bought my SPF 1037 (built in 2001) last June and it had almost 1,800 miles. I've since put 1,000 miles on it since
Location does have alot to do with it. I put the cobra to bed for its long winter's nap in October, and she didn't wake up until May!! So almost 8 months of no driving. Plus, living in Cleveland, it's been an unusually wet Spring so no weekend driving here lately.