I had the same problem with Sony CD-R's. They would play perfectly on various inside players, but would skip and hang-up in the car when other burned cd's played fine. Someone told me that the problem had to do with the "reflectivity" of the disk and to try burning at a slower speed. I experimented with different burn speeds (4x, 2x, and 1x), but still had the same problem, although to a lesser extent on 2x and 1x disks. I finally put the Sony's aside, bought some Taiyo Yuden CD-R's and no longer have any problems. By the way, the Taiyo Yuden disks are less reflective and show a magnified image compared to the Sony's mirrorlike finish. Go figure.