There is no problem using CD-Rs. I have six in my 2002 IS200 stereo with Epson sticker labels. I wrote disks on speed of 40x and 24x. No difference. It's read without any problem. So don't believe in that you have to write on slower speeds. It's true for older CD-RW drives and bad Hi-Fi stereo players. Japanese drives (Sony, Panasonic, Lexus (which are Fujitsu or Pioneer), Mitsubishi) have no problem of reading CD-Rs. While others like Daewoo, stereo in Volvo S40 which I had may not read all the discs even not depending on recording speed. I wrote the units which I tried. Good Luck.