The Singer 6212 has a number of points that need oil. See page 33 (page 34 of the PDF) of the manual. The oil needs to be on the moving parts of the needle bar, the thread take-up mechanism, and in the bobbin case. See the manual at https://www.singer.com/sites/default/files/product_manual/SINGER%206202%20and%206212%20Sewing%20Machines.pdf . Another manual for the 6212 is https://www.singer.com/sites/default/files/product_manual/SINGER%204522_4525_6011_6012_6211_6212_6605%20and%207011%20Sewing%20Machines.pdf . This shows the lubrication points on pages 68 and 69.
I hope this helps. Most Singer manuals are available here https://www.singer.com/support .
Answers & Comments
The Singer 6212 has a number of points that need oil. See page 33 (page 34 of the PDF) of the manual. The oil needs to be on the moving parts of the needle bar, the thread take-up mechanism, and in the bobbin case. See the manual at https://www.singer.com/sites/default/files/product_manual/SINGER%206202%20and%206212%20Sewing%20Machines.pdf . Another manual for the 6212 is https://www.singer.com/sites/default/files/product_manual/SINGER%204522_4525_6011_6012_6211_6212_6605%20and%207011%20Sewing%20Machines.pdf . This shows the lubrication points on pages 68 and 69.
I hope this helps. Most Singer manuals are available here https://www.singer.com/support .
Cindy Wells