It all depends on your drive's capabilities. Some old drives can play virtually any CDR, others have lots of difficulties. My first cdrom (external scsi, 1x) plays everything what I've tried, whereas a 4x doesn't .
However, most drives have difficulties with CDR's that give less reflection (mostly see-through cheap media). 80min can be a problem too. So maybe it's best to get 1 cdr of different brands (TDK, Sony, Maxwell, Phillips, Verbatim,..) and test them. Next: get a 100+ box of the CDR with the best compatibility (if any) and use them only for the old drive (100+ because CDR's productionlines change all the time, even for the same brand )
BTW: any CDRW will NOT work in such an old drive.