I just got a Kettler pacer. The treadmill is delivered without lubrication. The manual refers to a spray lubrication but a thumb pushable tube is supplied which is very difficult to use - mine broke after about 40 pushes but i still have the silicon oil.
It is totally unclear to me how much lubrication i should apply to the treadmill. So far i have applied about 15ml using a long handled spoon.
How wet/dry does the sliding surface have to be?
Currently there is almost zero sign of the lubrication at the edges but further in I think it is ok.