[Pete Ashby]

John

don't use light oil, originally the paddle box is filled with a thick fatty grease you can still get this from various vintage part suppliers mostly in the USA, try a Ford or Mopar or Chev vintage parts dealer.

Or use Vaseline petroleum jelly, it works OK here in the UK but may get too thin in hot climes. The idea of the grease is to act as a vacuum seal between the paddle and the body of the wiper motor.

Pete