I haven't bothered burning an audio disc since... geez, like, yet this century. But the last time I did it was just track-from-source, burned as track-to-disc, so that would have been what, a WMA file? And yeah, I think I only got like 18 songs on a disc.
I am not an expert at this.
However, if I could get even 'just' eighty minutes on a disc, that's fine. It's just that the local radio station- that is, the only one that's even remotely worth listening to, is a "classic rock" station. I'm pretty sure they're contractually prohibited from playing anything newer than Smells Like Teen Spirit.