I agree with the Maxell discs. That's all we've used and have never had a problem.
I also use a program called Sonic Record Now (though there are others) to burn my cds. When it 1st loads, you're given 3 options, one is audio cd for home or car (will burn in the format that CDs bought in the store are in) and you'll get maybe as many as 20 or so songs on the disc, the 2nd option is data disc....this would be for something like Word documents and stuff like that....the 3rd option is MP3 format and you'll get over 100 MP3s on one disc, but not all players recognize this format. Your computer would naturally, but I'm not sure the CD player in your automobile would.
Edit: I just opened the program and the 3rd option is not MP3 format, but rather exact copy. If you've got an MP3 that you wish to burn, it will burn in MP3 format if you choose exact copy. If it's another format, it will burn in that format, not MP3. Sorry if I confused anyone.