If you are oiling the platter bearing, first remove the outer platter and then remove the smaller sub-platter. Clean off any old oil from the bearing with something like tissue paper. Use a flashlight and check the main bearing well on the table. Might want to clean it using something like a Q-Tip or tissue paper.
Put about 3 or 4 drops of oil inside the main bearing well. Put a couple of drops on the bearing shaft attached to the sub-platter. Insert the sub-platter back into the bearing well. It will take some time to settle. Might want to give the sub-platter a spin or two with your fingers, and then it will slowly start to settle. When it has settled, then carefully put the outer platter on the sub-platter. Check and see if any excess oil had been pushed out after you run it a couple of minutes (remove the outer platter and raise up the sub-platter about half-way to check this). If so, then no problem, just clean it off.
I oiled plenty of Thorens and Linn Sondek bearings back in the 1970s and 1980s. We mostly used oil from the Linn distributor back then, so I don't know what people are using today. Some say its okay to use sewing machine oil. Others recommend synthetic 5W30 I think.
The Thorens 3-point suspension also needs tuning from time to time to insure the proper uniform bounce or "jello". The absolute best way to do that is to take it to someone who has a Linn set-up jig. The TD 145, 160, & 165/166 from that era fit on that set-up jig.