In lieu of adding an oil cooling unit in the machine room. Did you ever try forcing the car to park at the bottom landing which would put most of the oil back in the tank. Due to the sheer volume of oil in the tank it may have aided in the oil cooling capacity. I've had to do strange things when for example you have 16 90s in the oil line from machine room to the jack. Another unit that came to mind was a duplex years ago which was a rarely used office building parking garage during the day but at night it took a huge amount of people up and down to a cinema. In these cases the solution was a larger oil line. I had one recently that is a very busy medical clinic during the day but basically vacant at night. The building engineer decided to turn the machine room ac unit down to about 50 degrees every day before he left because he would walk into the machine room and it seemed hot. Needless to say the unit had leveling problems every morning until we got on to what the guy was doing.
