The used motor on this one:
http://www.conrad.com/ce/en/product/...tor-Modelcraft
Powered on a 13.8 volt power supply It will run about 370rpm and when the pinch is going less it will be arround 400rpm

As an oil I use Shell 0w20 oil

1st start I heat it up until 95 degrees to have some heat for a low pinch. You have to warm it up for about 20 minutes when the bath on all sides feels hand warm before starting the motor.
After a half hour running you will notice the rpm did raise a bit and the current is much lower than at the 1st start.
Then I set it to 85 degrees and you will notice the current is going up a tiny bit and the rpm lowers a tiny bit.
Then I let it run for several hours and after that I lower the temp to 65~70 degrees and let it run for 1 hour.

Then stop, cool it down, take it out and clean it with brake cleaner and a towel.