This Featherweight motor lubricant is made for vintage Singer motors that have a felt wick, including the Singer Featherweight 221 & 222K.
The Singer Featherweight motor has two little holes that you squeeze a small amount of lubricant into. As the electric motor heats up during use it will wick the lubricant into the motor as needed. Adding grease to these ports twice a year is usually adequate unless you sew for long periods of time or do any free-motion quilting.
Your Singer Featherweight Machine Manual will show you all the grease and oil points for your machine.
*** Do not use oil in your Singer Motor. Your motor should only have motor lubricant/grease and not oil. Putting oil in your Singer motor will risk ruining it and making it inoperable. ***