Hi,
each and every CD is in the "red book standard", which is uncompressed PCM, 16 Bit at 44.1 kHz Samplerate. It doesn't matter if you use WAV, mp3, AIF or whatever as long as your burning program know how to convert all this fuzz into 44.1 16 bit, period.
But: Of course it is a bad idea to produce a professional CD from a mp3 file (cough, cough...), because mp3 means it has been truncated and compressed and sqeezed and stuffed to fit into only a few MB's. When it comes out, it will have creases all around 😉
So: Use WAV's, AIFF's, CAF's or whatever uncompressed PCM format you prefer. Logic *by default* first bounces every bounce into this format, then afterwards converts it into, let's say, mp3. If you want to give your Songs to a professional studio for mastering/burning and mass copying, leave everything as it is, maybe give them the Logic Project if they have Logic, or bounce a WAV *without dithering*
Fox