as Kwag-neken stated, it varies from movie to movie. First GOP then the Heineken/Corona, depending on your region.
If you're talking as Straight Time on a cdr {and more or less forsaking visual quality, at least on the tv, on the pc it played okay...}, then the most time I've been looney-tunes enough to try is 3 Hours. Pearl Harbor. There was some space left on the 74 min cdrw for a couple of trailers.
If its time/quality, then the one i did last week had a great balance of quality and file size. Mulholland Drive. 750mb, 147 minutes including credits. Haven't watched the whole movie but a couple of the scenes with that fine-a$$ Latina, are very well acted
, ¡ Impressive, Indeed ! . Representing, or what.
El Zooter