You guys are joking, right? Car lengths are anything between 20' and 200' feet. Anyone that's run an engine for more than a day can attest to that. Newbies generally give unbelievably long car counts. Five cars is likely to more like 20. But on long distances they are the opposite. "One hundred cars" they'll say when shoving into a track that holds 80. "Put your feet up." is often the last think you hear. At least that's what I tell a newbie at the throttle that doesn't have them in check.