Well, I did oil the trucks- that was my first move. I'm not quite sure where to oil the motor, though. I'll open it up again and look. Not sure if my make shift kitchen table layout has too much of a curve- 4 10" to make a tight oval. Maybe this is too much for this diesel?I would suggest lubing and oiling the trucks and the motor(s) if you can. I usually only hear a growl when Itry to send a steamer around too tight of a curve.